diff --git a/website2/Dockerfile b/website2/Dockerfile
index 8b9eb2e..25791b5 100755
--- a/website2/Dockerfile
+++ b/website2/Dockerfile
@@ -22,6 +22,4 @@
 COPY ./docs /app/docs
 COPY ./website /app/website
 RUN yarn install
-RUN git config user.name "Heron Publish"
-RUN git config user.email "publish@heron.incubator.apache.org"
 CMD ["yarn", "start"]
diff --git a/website2/docs/getting-started-local-single-node.md b/website2/docs/getting-started-local-single-node.md
index 4a958e8..9a23a3e 100644
--- a/website2/docs/getting-started-local-single-node.md
+++ b/website2/docs/getting-started-local-single-node.md
@@ -28,7 +28,7 @@
 * [MacOS](#macos-homebrew)
 * [Ubuntu >= 14.04](#using-installation-scripts)
 * [CentOS](#using-installation-scripts)
-aa
+
 For other platforms, you need to build from source. Please refer to the [guide to compiling Heron](compiling-overview).
 
 ## Step 1 --- Download the Heron tools
diff --git a/website2/website/README.md b/website2/website/README.md
index fcc4d46..f44f6b8 100755
--- a/website2/website/README.md
+++ b/website2/website/README.md
@@ -16,10 +16,6 @@
     specific language governing permissions and limitations
     under the License.
 -->
- perl -pi -e 's/^  */\t/' Makefile
- chmod +x scripts/*
- npm run version 0.21.2
-
 
 # The Heron website and documentation
 
diff --git a/website2/website/package-lock.json b/website2/website/package-lock.json
index 3388bcf..72fe317 100644
--- a/website2/website/package-lock.json
+++ b/website2/website/package-lock.json
@@ -8,7 +8,7 @@
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       "dev": true,
       "requires": {
-        "@babel/highlight": "7.0.0"
+        "@babel/highlight": "^7.0.0"
       }
     },
     "@babel/core": {
@@ -17,20 +17,20 @@
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       "dev": true,
       "requires": {
-        "@babel/code-frame": "7.0.0",
-        "@babel/generator": "7.4.4",
-        "@babel/helpers": "7.4.4",
-        "@babel/parser": "7.4.5",
-        "@babel/template": "7.4.4",
-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4",
-        "convert-source-map": "1.6.0",
-        "debug": "4.1.1",
-        "json5": "2.1.0",
-        "lodash": "4.17.11",
-        "resolve": "1.11.1",
-        "semver": "5.7.0",
-        "source-map": "0.5.7"
+        "@babel/code-frame": "^7.0.0",
+        "@babel/generator": "^7.4.4",
+        "@babel/helpers": "^7.4.4",
+        "@babel/parser": "^7.4.5",
+        "@babel/template": "^7.4.4",
+        "@babel/traverse": "^7.4.5",
+        "@babel/types": "^7.4.4",
+        "convert-source-map": "^1.1.0",
+        "debug": "^4.1.0",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.11",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
       }
     },
     "@babel/generator": {
@@ -39,11 +39,11 @@
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-        "@babel/types": "7.4.4",
-        "jsesc": "2.5.2",
-        "lodash": "4.17.11",
-        "source-map": "0.5.7",
-        "trim-right": "1.0.1"
+        "@babel/types": "^7.4.4",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.11",
+        "source-map": "^0.5.0",
+        "trim-right": "^1.0.1"
       }
     },
     "@babel/helper-annotate-as-pure": {
@@ -52,7 +52,7 @@
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       "dev": true,
       "requires": {
-        "@babel/types": "7.4.4"
+        "@babel/types": "^7.0.0"
       }
     },
     "@babel/helper-builder-binary-assignment-operator-visitor": {
@@ -61,8 +61,8 @@
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       "dev": true,
       "requires": {
-        "@babel/helper-explode-assignable-expression": "7.1.0",
-        "@babel/types": "7.4.4"
+        "@babel/helper-explode-assignable-expression": "^7.1.0",
+        "@babel/types": "^7.0.0"
       }
     },
     "@babel/helper-builder-react-jsx": {
@@ -71,8 +71,8 @@
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       "dev": true,
       "requires": {
-        "@babel/types": "7.4.4",
-        "esutils": "2.0.2"
+        "@babel/types": "^7.3.0",
+        "esutils": "^2.0.0"
       }
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     "@babel/helper-call-delegate": {
@@ -81,9 +81,9 @@
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-        "@babel/helper-hoist-variables": "7.4.4",
-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4"
+        "@babel/helper-hoist-variables": "^7.4.4",
+        "@babel/traverse": "^7.4.4",
+        "@babel/types": "^7.4.4"
       }
     },
     "@babel/helper-create-class-features-plugin": {
@@ -92,12 +92,12 @@
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-        "@babel/helper-member-expression-to-functions": "7.0.0",
-        "@babel/helper-optimise-call-expression": "7.0.0",
-        "@babel/helper-plugin-utils": "7.0.0",
-        "@babel/helper-replace-supers": "7.4.4",
-        "@babel/helper-split-export-declaration": "7.4.4"
+        "@babel/helper-function-name": "^7.1.0",
+        "@babel/helper-member-expression-to-functions": "^7.0.0",
+        "@babel/helper-optimise-call-expression": "^7.0.0",
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/helper-replace-supers": "^7.4.4",
+        "@babel/helper-split-export-declaration": "^7.4.4"
       }
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     "@babel/helper-define-map": {
@@ -106,9 +106,9 @@
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-        "@babel/helper-function-name": "7.1.0",
-        "@babel/types": "7.4.4",
-        "lodash": "4.17.11"
+        "@babel/helper-function-name": "^7.1.0",
+        "@babel/types": "^7.4.4",
+        "lodash": "^4.17.11"
       }
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     "@babel/helper-explode-assignable-expression": {
@@ -117,8 +117,8 @@
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       "dev": true,
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-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4"
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
       }
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     "@babel/helper-function-name": {
@@ -127,9 +127,9 @@
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-        "@babel/helper-get-function-arity": "7.0.0",
-        "@babel/template": "7.4.4",
-        "@babel/types": "7.4.4"
+        "@babel/helper-get-function-arity": "^7.0.0",
+        "@babel/template": "^7.1.0",
+        "@babel/types": "^7.0.0"
       }
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@@ -138,7 +138,7 @@
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       "dev": true,
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-        "@babel/types": "7.4.4"
+        "@babel/types": "^7.0.0"
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     "@babel/helper-hoist-variables": {
@@ -147,7 +147,7 @@
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-        "@babel/types": "7.4.4"
+        "@babel/types": "^7.4.4"
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@@ -156,7 +156,7 @@
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       "dev": true,
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-        "@babel/types": "7.4.4"
+        "@babel/types": "^7.0.0"
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     "@babel/helper-module-imports": {
@@ -165,7 +165,7 @@
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       "dev": true,
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-        "@babel/types": "7.4.4"
+        "@babel/types": "^7.0.0"
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     "@babel/helper-module-transforms": {
@@ -174,12 +174,12 @@
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-        "@babel/helper-simple-access": "7.1.0",
-        "@babel/helper-split-export-declaration": "7.4.4",
-        "@babel/template": "7.4.4",
-        "@babel/types": "7.4.4",
-        "lodash": "4.17.11"
+        "@babel/helper-module-imports": "^7.0.0",
+        "@babel/helper-simple-access": "^7.1.0",
+        "@babel/helper-split-export-declaration": "^7.4.4",
+        "@babel/template": "^7.4.4",
+        "@babel/types": "^7.4.4",
+        "lodash": "^4.17.11"
       }
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@@ -188,7 +188,7 @@
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       "dev": true,
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-        "@babel/types": "7.4.4"
+        "@babel/types": "^7.0.0"
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@@ -203,7 +203,7 @@
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-        "lodash": "4.17.11"
+        "lodash": "^4.17.11"
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@@ -212,11 +212,11 @@
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-        "@babel/helper-wrap-function": "7.2.0",
-        "@babel/template": "7.4.4",
-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4"
+        "@babel/helper-annotate-as-pure": "^7.0.0",
+        "@babel/helper-wrap-function": "^7.1.0",
+        "@babel/template": "^7.1.0",
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
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@@ -225,10 +225,10 @@
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-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4"
+        "@babel/helper-member-expression-to-functions": "^7.0.0",
+        "@babel/helper-optimise-call-expression": "^7.0.0",
+        "@babel/traverse": "^7.4.4",
+        "@babel/types": "^7.4.4"
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@@ -237,8 +237,8 @@
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-        "@babel/types": "7.4.4"
+        "@babel/template": "^7.1.0",
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@@ -247,7 +247,7 @@
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+        "@babel/types": "^7.4.4"
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@@ -256,10 +256,10 @@
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-        "@babel/template": "7.4.4",
-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4"
+        "@babel/helper-function-name": "^7.1.0",
+        "@babel/template": "^7.1.0",
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.2.0"
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@@ -268,9 +268,9 @@
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-        "@babel/traverse": "7.4.5",
-        "@babel/types": "7.4.4"
+        "@babel/template": "^7.4.4",
+        "@babel/traverse": "^7.4.4",
+        "@babel/types": "^7.4.4"
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     "@babel/highlight": {
@@ -279,9 +279,9 @@
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       "dev": true,
       "requires": {
-        "chalk": "2.4.2",
-        "esutils": "2.0.2",
-        "js-tokens": "4.0.0"
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
       }
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     "@babel/parser": {
@@ -296,9 +296,9 @@
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-        "@babel/helper-remap-async-to-generator": "7.1.0",
-        "@babel/plugin-syntax-async-generators": "7.2.0"
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/helper-remap-async-to-generator": "^7.1.0",
+        "@babel/plugin-syntax-async-generators": "^7.2.0"
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     "@babel/plugin-proposal-class-properties": {
@@ -307,8 +307,8 @@
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-        "@babel/helper-plugin-utils": "7.0.0"
+        "@babel/helper-create-class-features-plugin": "^7.4.4",
+        "@babel/helper-plugin-utils": "^7.0.0"
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     "@babel/plugin-proposal-json-strings": {
@@ -317,8 +317,8 @@
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-        "@babel/plugin-syntax-json-strings": "7.2.0"
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-syntax-json-strings": "^7.2.0"
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@@ -327,8 +327,8 @@
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-        "@babel/plugin-syntax-object-rest-spread": "7.2.0"
+        "@babel/helper-plugin-utils": "^7.0.0",
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-        "@babel/plugin-syntax-optional-catch-binding": "7.2.0"
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-syntax-optional-catch-binding": "^7.2.0"
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-        "@babel/helper-regex": "7.4.4",
-        "regexpu-core": "4.5.4"
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/helper-regex": "^7.4.4",
+        "regexpu-core": "^4.5.4"
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@@ -358,7 +358,7 @@
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       "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
       "dev": true,
       "requires": {
-        "punycode": "2.1.1"
+        "punycode": "^2.1.0"
       }
     },
+    "uri-template-lite": {
+      "version": "19.4.0",
+      "resolved": "https://registry.npmjs.org/uri-template-lite/-/uri-template-lite-19.4.0.tgz",
+      "integrity": "sha512-VY8dgwyMwnCztkzhq0cA/YhNmO+YZqow//5FdmgE2fZU/JPi+U0rPL7MRDi0F+Ch4vJ7nYidWzeWAeY7uywe9g==",
+      "dev": true
+    },
     "urix": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
@@ -9479,8 +10424,8 @@
       "integrity": "sha512-d3uaVyzDB9tQoSXFvuSUNFibTd9zxd2bkVrDRvF5TmvWWQwqE4lgYJ5m+x1DbecWkw+LK4RNl2CU1hHuOKPVlg==",
       "dev": true,
       "requires": {
-        "querystringify": "2.1.1",
-        "requires-port": "1.0.0"
+        "querystringify": "^2.1.1",
+        "requires-port": "^1.0.0"
       }
     },
     "url-parse-lax": {
@@ -9489,7 +10434,7 @@
       "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
       "dev": true,
       "requires": {
-        "prepend-http": "1.0.4"
+        "prepend-http": "^1.0.1"
       }
     },
     "url-to-options": {
@@ -9516,8 +10461,8 @@
       "integrity": "sha512-i+6qA2MPhvoKLuxnJNpXAGhg7HphQOSUq2LKMZD0m15EiskXUkMvKdF4Uui0WYeCUGea+o2cw/ZuwehtfsrNkA==",
       "dev": true,
       "requires": {
-        "define-properties": "1.1.3",
-        "object.getownpropertydescriptors": "2.0.3"
+        "define-properties": "^1.1.2",
+        "object.getownpropertydescriptors": "^2.0.3"
       }
     },
     "utils-merge": {
@@ -9538,8 +10483,8 @@
       "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
       "dev": true,
       "requires": {
-        "spdx-correct": "3.1.0",
-        "spdx-expression-parse": "3.0.0"
+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
       }
     },
     "vary": {
@@ -9560,9 +10505,9 @@
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
       "dev": true,
       "requires": {
-        "assert-plus": "1.0.0",
+        "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
-        "extsprintf": "1.3.0"
+        "extsprintf": "^1.2.0"
       }
     },
     "websocket-driver": {
@@ -9571,8 +10516,8 @@
       "integrity": "sha1-DK+dLXVdk67gSdS90NP+LMoqJOs=",
       "dev": true,
       "requires": {
-        "http-parser-js": "0.5.0",
-        "websocket-extensions": "0.1.3"
+        "http-parser-js": ">=0.4.0",
+        "websocket-extensions": ">=0.1.1"
       }
     },
     "websocket-extensions": {
@@ -9593,15 +10538,53 @@
       "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
-        "isexe": "2.0.0"
+        "isexe": "^2.0.0"
       }
     },
+    "which-module": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+      "dev": true
+    },
     "wordwrap": {
       "version": "0.0.2",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
       "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
       "dev": true
     },
+    "wrap-ansi": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "dev": true,
+      "requires": {
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1"
+      },
+      "dependencies": {
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
+            "number-is-nan": "^1.0.0"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
+          }
+        }
+      }
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
@@ -9620,20 +10603,35 @@
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
       "dev": true
     },
+    "y18n": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "dev": true
+    },
     "yallist": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
       "dev": true
     },
+    "yaml": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.6.0.tgz",
+      "integrity": "sha512-iZfse3lwrJRoSlfs/9KQ9iIXxs9++RvBFVzAqbbBiFT+giYtyanevreF9r61ZTbGMgWQBxAua3FzJiniiJXWWw==",
+      "dev": true,
+      "requires": {
+        "@babel/runtime": "^7.4.5"
+      }
+    },
     "yamljs": {
       "version": "0.2.10",
       "resolved": "https://registry.npmjs.org/yamljs/-/yamljs-0.2.10.tgz",
       "integrity": "sha1-SBzHwlynOvWfWR8MluPOVsdXpA8=",
       "dev": true,
       "requires": {
-        "argparse": "1.0.10",
-        "glob": "7.1.4"
+        "argparse": "^1.0.7",
+        "glob": "^7.0.5"
       }
     },
     "yargs": {
@@ -9645,14 +10643,32 @@
         "wordwrap": "0.0.2"
       }
     },
+    "yargs-parser": {
+      "version": "11.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
+      "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "5.3.1",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+          "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
+          "dev": true
+        }
+      }
+    },
     "yauzl": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
       "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
       "dev": true,
       "requires": {
-        "buffer-crc32": "0.2.13",
-        "fd-slicer": "1.1.0"
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
       }
     }
   }
diff --git a/website2/website/versioned_docs/version-0.21.1/getting-started-local-single-node.md b/website2/website/versioned_docs/version-0.21.1/getting-started-local-single-node.md
deleted file mode 100644
index a9c9117..0000000
--- a/website2/website/versioned_docs/version-0.21.1/getting-started-local-single-node.md
+++ /dev/null
@@ -1,286 +0,0 @@
----
-id: version-0.21.1-getting-started-local-single-node
-title: Local (Single Node)
-sidebar_label: Local (Single Node)
-original_id: getting-started-local-single-node
----
-<!--
-    Licensed to the Apache Software Foundation (ASF) under one
-    or more contributor license agreements.  See the NOTICE file
-    distributed with this work for additional information
-    regarding copyright ownership.  The ASF licenses this file
-    to you under the Apache License, Version 2.0 (the
-    "License"); you may not use this file except in compliance
-    with the License.  You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
-    Unless required by applicable law or agreed to in writing,
-    software distributed under the License is distributed on an
-    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-    KIND, either express or implied.  See the License for the
-    specific language governing permissions and limitations
-    under the License.
--->
-
-> The current version of Heron is {{heron:version}}
-
-
-The easiest way to get started learning Heron is to install the Heron client tools, which are currently available for:
-
-* [MacOS](#macos-homebrew)
-* [Ubuntu >= 14.04](#using-installation-scripts)
-* [CentOS](#using-installation-scripts)
-
-For other platforms, you need to build from source. Please refer to the [guide to compiling Heron](compiling-overview).
-
-## Step 1 --- Download the Heron tools
-
-Heron tools can be installed on [macOS](#macos-homebrew) using [Homebrew](https://brew.sh) and on Linux using [installation scripts](#using-installation-scripts).
-
-> You can install using [installation scripts](#using-installation-scripts) on macOS as well.
-
-## macOS/Homebrew
-
-The easiest way to get started with Heron on macOS is using [Homebrew](https://brew.sh):
-
-```bash
-$ brew tap streamlio/homebrew-formulae
-$ brew update
-$ brew install heron
-```
-
-This will install a variety of executables and other resources by default in `/usr/local/opt/heron`.
-
-> Homebrew may use a different folder than `/usr/local/opt/heron`. To check which folder is being used, run `brew --prefix heron`.
-
-## Using installation scripts
-
-To install Heron binaries directly, using installation scripts, go to Heron's [releases page](https://github.com/apache/incubator-heron/releases) on GitHub
-and see a full listing of Heron releases for each available platform. The installation script for macOS (`darwin`), for example, is named
-`heron-install-{{% heronVersion %}}-darwin.sh`.
-
-Download the for your platform either from the releases page or using [`wget`](https://www.gnu.org/software/wget/). Here's a `wget` example for Ubuntu:
-
-```bash
-$ wget https://github.com/apache/incubator-heron/releases/download/{{% heronVersion %}}/heron-install-{{% heronVersion %}}-ubuntu.sh
-```
-
-Once you've downloaded the script, make it executable using [chmod](https://en.wikipedia.org/wiki/Chmod):
-
-```bash
-$ chmod +x heron-*.sh
-```
-
-> The script will install executables in the `~/bin` folder. You should add that folder to your `PATH` using `export PATH=~/bin:$PATH`.
-
-Now run the [Heron client](user-manuals-heron-cli) installation script with the `--user` flag set. Here's an example for Ubuntu:
-
-```bash
-$ ./heron-install-{{% heronVersion %}}-ubuntu.sh --user
-Heron installer
----------------
-
-Uncompressing...done
-...
-Heron is now installed!
-```
-
-To check that Heron is successfully installed, run `heron version`:
-
-```bash
-$ heron version
-heron.build.git.revision : 26bb4096130a05f9799510bbce6c37a69a7342ef
-heron.build.git.status : Clean
-heron.build.host : ...
-heron.build.time : Sat Aug  6 12:35:47 PDT {{% currentYear %}}
-heron.build.timestamp : 1470512147000
-heron.build.user : ...
-heron.build.version : {{% heronVersion %}}
-```
-
-## Step 2 --- Launch an example topology
-
-> #### Note for macOS users
-
-> If you want to run topologies locally on macOS, you may need to add your
-> hostname to your `/etc/hosts` file under `localhost`. Here's an example line:
-> `127.0.0.1 localhost My-Mac-Laptop.local`. You can fetch your hostname by simply
-> running `hostname` in your shell.
-
-If you set the `--user` flag when running the installation scripts, some example
-topologies will be installed in your `~/.heron/examples` directory. You can
-launch an example [topology](heron-topology-concepts) locally (on your machine)
-using the [Heron CLI tool](user-manuals-heron-cli):
-
-```bash
-$ heron submit local \
-  ~/.heron/examples/heron-streamlet-examples.jar \
-  org.apache.heron.examples.streamlet.WindowedWordCountTopology \
-  WindowedWordCountTopology \
-  --deploy-deactivated
-```
-
-The output should look something like this:
-
-```bash
-INFO: Launching topology 'WindowedWordCountTopology'
-
-...
-
-INFO: Topology 'WindowedWordCountTopology' launched successfully
-INFO: Elapsed time: 3.409s.
-```
-
-This will *submit* the topology to your locally running Heron cluster but it
-won't *activate* the topology because the `--deploy-deactivated` flag was set.
-Activating the topology will be explored in [step
-5](#step-5-explore-topology-management-commands) below.
-
-Note that the output shows whether the topology has been launched successfully as well
-the working directory for the topology.
-
-To check what's under the working directory, run:
-
-```bash
-$ ls -al ~/.herondata/topologies/local/${ROLE}/WindowedWordCountTopology
--rw-r--r--   1 username  staff     6141 Oct 12 09:58 WindowedWordCountTopology.defn
--rw-r--r--   1 username  staff        5 Oct 12 09:58 container_1_flatmap1_4.pid
--rw-r--r--   1 username  staff        5 Oct 12 09:58 container_1_logger1_3.pid
-# etc.
-```
-
-All instances' log files can be found in `log-files` under the working directory:
-
-```bash
-$ ls -al ~/.herondata/topologies/local/${ROLE}/WindowedWordCountTopology/log-files
-total 408
--rw-r--r--   1 username  staff   5055 Oct 12 09:58 container_1_flatmap1_4.log.0
--rw-r--r--   1 username  staff      0 Oct 12 09:58 container_1_flatmap1_4.log.0.lck
--rw-r--r--   1 username  staff   5052 Oct 12 09:58 container_1_logger1_3.log.0
-# etc.
-```
-
-## Step 3 --- Start Heron Tracker
-
-The [Heron Tracker](user-manuals-heron-tracker-runbook) is a web service that
-continuously gathers information about your Heron cluster. You can launch the
-tracker by running the `heron-tracker` command (which is already installed):
-
-```bash
-$ heron-tracker
-... Running on port: 8888
-... Using config file: $HOME/.herontools/conf/heron_tracker.yaml
-```
-
-You can reach Heron Tracker in your browser at [http://localhost:8888](http://localhost:8888)
-and see something like the following upon successful submission of the topology:
-![Heron Tracker](assets/heron-tracker.png)
-
-To explore Heron Tracker, please refer to [Heron Tracker Rest API](user-manuals-tracker-rest)
-
-## Step 4 --- Start Heron UI
-
-[Heron UI](user-manuals-heron-ui-runbook) is a user interface that uses Heron Tracker to
-provide detailed visual representations of your Heron topologies. To launch
-Heron UI:
-
-```bash
-$ heron-ui
-... Running on port: 8889
-... Using tracker url: http://localhost:8888
-```
-
-You can open Heron UI in your browser at [http://localhost:8889](http://localhost:8889)
-and see something like this upon successful submission of the topology:
-![Heron UI](assets/heron-ui.png)
-
-To play with Heron UI, please refer to [Heron UI Usage Guide](guides-ui-guide)
-
-## Step 5 --- Explore topology management commands
-
-In step 2 you submitted a topology to your local cluster. The `heron` CLI tool
-also enables you to activate, deactivate, and kill topologies and more.
-
-```bash
-$ heron activate local WindowedWordCountTopology
-$ heron deactivate local WindowedWordCountTopology
-$ heron kill local WindowedWordCountTopology
-```
-
-Upon successful actions, a message similar to the following will appear:
-
-```bash
-INFO: Successfully activated topology 'WindowedWordCountTopology'
-INFO: Elapsed time: 1.980s.
-```
-
-For more info on these commands, read about [topology
-lifecycles](heron-topology-concepts#topology-lifecycle).
-
-To list the available CLI commands, run `heron` by itself:
-
-```bash
-usage: heron <command> <options> ...
-
-Available commands:
-    activate           Activate a topology
-    deactivate         Deactivate a topology
-    help               Prints help for commands
-    kill               Kill a topology
-    restart            Restart a topology
-    submit             Submit a topology
-    version            Print version of heron-cli
-
-For detailed documentation, go to http://heronstreaming.io
-```
-
-To invoke help output for a command, run `heron help COMMAND`. Here's an
-example:
-
-```bash
-$ heron help submit
-usage: heron submit [options] cluster/[role]/[environ] topology-file-name topology-class-name [topology-args]
-
-Required arguments:
-  cluster/[role]/[env]  Cluster, role, and environ to run topology
-  topology-file-name    Topology jar/tar/zip file
-  topology-class-name   Topology class name
-
-Optional arguments:
-  --config-path (a string; path to cluster config; default: "$HOME/.heron/conf")
-  --config-property (key=value; a config key and its value; default: [])
-  --deploy-deactivated (a boolean; default: "false")
-  -D DEFINE             Define a system property to pass to java -D when
-                        running main.
-  --verbose (a boolean; default: "false")
-```
-
-## Step 6 --- Explore other example topologies
-
-The source code for the example topologies can be found
-[on
-GitHub]({{% githubMaster %}}/examples/src/java/org/apache/heron/examples).
-The included example topologies:
-
-* `AckingTopology.java` --- A topology with acking enabled.
-* `ComponentJVMOptionsTopology.java` --- A topology that supplies JVM options
-  for each component.
-* `CustomGroupingTopology.java` --- A topology that implements custom grouping.
-* `ExclamationTopology.java` --- A spout that emits random words to a bolt that
-  then adds an exclamation mark.
-* `MultiSpoutExclamationTopology.java` --- a topology with multiple spouts.
-* `MultiStageAckingTopology.java` --- A three-stage topology. A spout emits to a
-  bolt that then feeds to another bolt.
-* `TaskHookTopology.java` --- A topology that uses a task hook to subscribe to
-   event notifications.
-
-## Troubleshooting
-In case of any issues, please refer to [Quick Start Troubleshooting](getting-started-troubleshooting-guide).
-
-### Next Steps
-
-* [Migrate Storm topologies](getting-started-migrate-storm-topologies) to Heron with simple `pom.xml`
-  changes
-* [Deploy topologies](deployment-overview) in clustered, scheduler-driven
-  environments (such as on [Aurora](schedulers-aurora-cluster)
-  and [locally](schedulers-local))
-* [Develop topologies](heron-architecture) for Heron
\ No newline at end of file
diff --git a/website2/website/versioned_docs/version-0.21.2/getting-started-local-single-node.md b/website2/website/versioned_docs/version-0.21.2/getting-started-local-single-node.md
deleted file mode 100644
index 672509b..0000000
--- a/website2/website/versioned_docs/version-0.21.2/getting-started-local-single-node.md
+++ /dev/null
@@ -1,286 +0,0 @@
----
-id: version-0.21.2-getting-started-local-single-node
-title: Local (Single Node)
-sidebar_label: Local (Single Node)
-original_id: getting-started-local-single-node
----
-<!--
-    Licensed to the Apache Software Foundation (ASF) under one
-    or more contributor license agreements.  See the NOTICE file
-    distributed with this work for additional information
-    regarding copyright ownership.  The ASF licenses this file
-    to you under the Apache License, Version 2.0 (the
-    "License"); you may not use this file except in compliance
-    with the License.  You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
-    Unless required by applicable law or agreed to in writing,
-    software distributed under the License is distributed on an
-    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-    KIND, either express or implied.  See the License for the
-    specific language governing permissions and limitations
-    under the License.
--->
-
-> The current version of Heron is {{heron:version}}
-
-The easiest way to get started learning Heron is to install the Heron client tools, which are currently available for:
-
-* [MacOS](#macos-homebrew)
-* [Ubuntu >= 14.04](#using-installation-scripts)
-* [CentOS](#using-installation-scripts)
-
-
-For other platforms, you need to build from source. Please refer to the [guide to compiling Heron](compiling-overview).
-
-## Step 1 --- Download the Heron tools
-
-Heron tools can be installed on [macOS](#macos-homebrew) using [Homebrew](https://brew.sh) and on Linux using [installation scripts](#using-installation-scripts).
-
-> You can install using [installation scripts](#using-installation-scripts) on macOS as well.
-
-## macOS/Homebrew
-
-The easiest way to get started with Heron on macOS is using [Homebrew](https://brew.sh):
-
-```bash
-$ brew tap streamlio/homebrew-formulae
-$ brew update
-$ brew install heron
-```
-
-This will install a variety of executables and other resources by default in `/usr/local/opt/heron`.
-
-> Homebrew may use a different folder than `/usr/local/opt/heron`. To check which folder is being used, run `brew --prefix heron`.
-
-## Using installation scripts
-
-To install Heron binaries directly, using installation scripts, go to Heron's [releases page](https://github.com/apache/incubator-heron/releases) on GitHub
-and see a full listing of Heron releases for each available platform. The installation script for macOS (`darwin`), for example, is named
-`heron-install-{{% heronVersion %}}-darwin.sh`.
-
-Download the for your platform either from the releases page or using [`wget`](https://www.gnu.org/software/wget/). Here's a `wget` example for Ubuntu:
-
-```bash
-$ wget https://github.com/apache/incubator-heron/releases/download/{{% heronVersion %}}/heron-install-{{% heronVersion %}}-ubuntu.sh
-```
-
-Once you've downloaded the script, make it executable using [chmod](https://en.wikipedia.org/wiki/Chmod):
-
-```bash
-$ chmod +x heron-*.sh
-```
-
-> The script will install executables in the `~/bin` folder. You should add that folder to your `PATH` using `export PATH=~/bin:$PATH`.
-
-Now run the [Heron client](user-manuals-heron-cli) installation script with the `--user` flag set. Here's an example for Ubuntu:
-
-```bash
-$ ./heron-install-{{% heronVersion %}}-ubuntu.sh --user
-Heron installer
----------------
-
-Uncompressing...done
-...
-Heron is now installed!
-```
-
-To check that Heron is successfully installed, run `heron version`:
-
-```bash
-$ heron version
-heron.build.git.revision : 26bb4096130a05f9799510bbce6c37a69a7342ef
-heron.build.git.status : Clean
-heron.build.host : ...
-heron.build.time : Sat Aug  6 12:35:47 PDT {{% currentYear %}}
-heron.build.timestamp : 1470512147000
-heron.build.user : ...
-heron.build.version : {{% heronVersion %}}
-```
-
-## Step 2 --- Launch an example topology
-
-> #### Note for macOS users
-
-> If you want to run topologies locally on macOS, you may need to add your
-> hostname to your `/etc/hosts` file under `localhost`. Here's an example line:
-> `127.0.0.1 localhost My-Mac-Laptop.local`. You can fetch your hostname by simply
-> running `hostname` in your shell.
-
-If you set the `--user` flag when running the installation scripts, some example
-topologies will be installed in your `~/.heron/examples` directory. You can
-launch an example [topology](heron-topology-concepts) locally (on your machine)
-using the [Heron CLI tool](user-manuals-heron-cli):
-
-```bash
-$ heron submit local \
-  ~/.heron/examples/heron-streamlet-examples.jar \
-  org.apache.heron.examples.streamlet.WindowedWordCountTopology \
-  WindowedWordCountTopology \
-  --deploy-deactivated
-```
-
-The output should look something like this:
-
-```bash
-INFO: Launching topology 'WindowedWordCountTopology'
-
-...
-
-INFO: Topology 'WindowedWordCountTopology' launched successfully
-INFO: Elapsed time: 3.409s.
-```
-
-This will *submit* the topology to your locally running Heron cluster but it
-won't *activate* the topology because the `--deploy-deactivated` flag was set.
-Activating the topology will be explored in [step
-5](#step-5-explore-topology-management-commands) below.
-
-Note that the output shows whether the topology has been launched successfully as well
-the working directory for the topology.
-
-To check what's under the working directory, run:
-
-```bash
-$ ls -al ~/.herondata/topologies/local/${ROLE}/WindowedWordCountTopology
--rw-r--r--   1 username  staff     6141 Oct 12 09:58 WindowedWordCountTopology.defn
--rw-r--r--   1 username  staff        5 Oct 12 09:58 container_1_flatmap1_4.pid
--rw-r--r--   1 username  staff        5 Oct 12 09:58 container_1_logger1_3.pid
-# etc.
-```
-
-All instances' log files can be found in `log-files` under the working directory:
-
-```bash
-$ ls -al ~/.herondata/topologies/local/${ROLE}/WindowedWordCountTopology/log-files
-total 408
--rw-r--r--   1 username  staff   5055 Oct 12 09:58 container_1_flatmap1_4.log.0
--rw-r--r--   1 username  staff      0 Oct 12 09:58 container_1_flatmap1_4.log.0.lck
--rw-r--r--   1 username  staff   5052 Oct 12 09:58 container_1_logger1_3.log.0
-# etc.
-```
-
-## Step 3 --- Start Heron Tracker
-
-The [Heron Tracker](user-manuals-heron-tracker-runbook) is a web service that
-continuously gathers information about your Heron cluster. You can launch the
-tracker by running the `heron-tracker` command (which is already installed):
-
-```bash
-$ heron-tracker
-... Running on port: 8888
-... Using config file: $HOME/.herontools/conf/heron_tracker.yaml
-```
-
-You can reach Heron Tracker in your browser at [http://localhost:8888](http://localhost:8888)
-and see something like the following upon successful submission of the topology:
-![Heron Tracker](assets/heron-tracker.png)
-
-To explore Heron Tracker, please refer to [Heron Tracker Rest API](user-manuals-tracker-rest)
-
-## Step 4 --- Start Heron UI
-
-[Heron UI](user-manuals-heron-ui-runbook) is a user interface that uses Heron Tracker to
-provide detailed visual representations of your Heron topologies. To launch
-Heron UI:
-
-```bash
-$ heron-ui
-... Running on port: 8889
-... Using tracker url: http://localhost:8888
-```
-
-You can open Heron UI in your browser at [http://localhost:8889](http://localhost:8889)
-and see something like this upon successful submission of the topology:
-![Heron UI](assets/heron-ui.png)
-
-To play with Heron UI, please refer to [Heron UI Usage Guide](guides-ui-guide)
-
-## Step 5 --- Explore topology management commands
-
-In step 2 you submitted a topology to your local cluster. The `heron` CLI tool
-also enables you to activate, deactivate, and kill topologies and more.
-
-```bash
-$ heron activate local WindowedWordCountTopology
-$ heron deactivate local WindowedWordCountTopology
-$ heron kill local WindowedWordCountTopology
-```
-
-Upon successful actions, a message similar to the following will appear:
-
-```bash
-INFO: Successfully activated topology 'WindowedWordCountTopology'
-INFO: Elapsed time: 1.980s.
-```
-
-For more info on these commands, read about [topology
-lifecycles](heron-topology-concepts#topology-lifecycle).
-
-To list the available CLI commands, run `heron` by itself:
-
-```bash
-usage: heron <command> <options> ...
-
-Available commands:
-    activate           Activate a topology
-    deactivate         Deactivate a topology
-    help               Prints help for commands
-    kill               Kill a topology
-    restart            Restart a topology
-    submit             Submit a topology
-    version            Print version of heron-cli
-
-For detailed documentation, go to http://heronstreaming.io
-```
-
-To invoke help output for a command, run `heron help COMMAND`. Here's an
-example:
-
-```bash
-$ heron help submit
-usage: heron submit [options] cluster/[role]/[environ] topology-file-name topology-class-name [topology-args]
-
-Required arguments:
-  cluster/[role]/[env]  Cluster, role, and environ to run topology
-  topology-file-name    Topology jar/tar/zip file
-  topology-class-name   Topology class name
-
-Optional arguments:
-  --config-path (a string; path to cluster config; default: "$HOME/.heron/conf")
-  --config-property (key=value; a config key and its value; default: [])
-  --deploy-deactivated (a boolean; default: "false")
-  -D DEFINE             Define a system property to pass to java -D when
-                        running main.
-  --verbose (a boolean; default: "false")
-```
-
-## Step 6 --- Explore other example topologies
-
-The source code for the example topologies can be found
-[on
-GitHub]({{% githubMaster %}}/examples/src/java/org/apache/heron/examples).
-The included example topologies:
-
-* `AckingTopology.java` --- A topology with acking enabled.
-* `ComponentJVMOptionsTopology.java` --- A topology that supplies JVM options
-  for each component.
-* `CustomGroupingTopology.java` --- A topology that implements custom grouping.
-* `ExclamationTopology.java` --- A spout that emits random words to a bolt that
-  then adds an exclamation mark.
-* `MultiSpoutExclamationTopology.java` --- a topology with multiple spouts.
-* `MultiStageAckingTopology.java` --- A three-stage topology. A spout emits to a
-  bolt that then feeds to another bolt.
-* `TaskHookTopology.java` --- A topology that uses a task hook to subscribe to
-   event notifications.
-
-## Troubleshooting
-In case of any issues, please refer to [Quick Start Troubleshooting](getting-started-troubleshooting-guide).
-
-### Next Steps
-
-* [Migrate Storm topologies](getting-started-migrate-storm-topologies) to Heron with simple `pom.xml`
-  changes
-* [Deploy topologies](deployment-overview) in clustered, scheduler-driven
-  environments (such as on [Aurora](schedulers-aurora-cluster)
-  and [locally](schedulers-local))
-* [Develop topologies](heron-architecture) for Heron
\ No newline at end of file
diff --git a/website2/website/versioned_docs/version-0.21.2/guides-ui-guide.md b/website2/website/versioned_docs/version-0.21.2/guides-ui-guide.md
deleted file mode 100644
index 9a029b4..0000000
--- a/website2/website/versioned_docs/version-0.21.2/guides-ui-guide.md
+++ /dev/null
@@ -1,206 +0,0 @@
----
-id: version-0.21.2-guides-ui-guide
-title: Heron UI Guide
-sidebar_label: Heron UI Guide
-original_id: guides-ui-guide
----
-<!--
-    Licensed to the Apache Software Foundation (ASF) under one
-    or more contributor license agreements.  See the NOTICE file
-    distributed with this work for additional information
-    regarding copyright ownership.  The ASF licenses this file
-    to you under the Apache License, Version 2.0 (the
-    "License"); you may not use this file except in compliance
-    with the License.  You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
-    Unless required by applicable law or agreed to in writing,
-    software distributed under the License is distributed on an
-    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-    KIND, either express or implied.  See the License for the
-    specific language governing permissions and limitations
-    under the License.
--->
-
-### Overview
-
-This guide describes how to make best use of Heron UI for monitoring and
-debugging topologies.
-
-The UI provides a lot of information about a topology or a part of it quickly,
-thus reducing debugging time considerably. Some of these features are
-listed below. A complete set of features can be found in following sections.
-
-1. See logical plan of a topology
-2. See physical plan of a topology
-3. Configs of a topology
-4. See some basic metrics for each of the instances and components
-5. Links to get logs, memory histogram, jstack, heapdump and exceptions of
-   a particular instance
-
-#### Topologies Page
-
-Heron UI is a user interface that uses the Heron Tracker to display detailed, colorful visual representations of topologies, including the logical and physical plan for each topology. 
-
-Start the Heron tracker using `heron-tracker &` which uses default heron_tracker.yaml configuration file. It's a centralized gateway for cluster-wide information about topologies, including which topologies are running, being launched, being killed, etc. It exposes Json Restful endpoint and relies on Zookeeper nodes.
-
-Launc the Heron UI by the command:
-
-```bash
-heron-ui &
-```
-
-By default Heron UI will be started at `http://localhost:8889`
-
-Below is the home page of Heron UI.
-
-The following information or actions can be found on this page.
-
-1. List of all topologies
-2. Number of topologies filtered after search (total by default)
-3. A topology's overview
-4. Filter the topologies using `cluster`
-5. Filter the topologies using string matching in names, clusters, environs,
-   roles, versions, or submitters
-6. Sort the topologies based on a particular column
-7. Click on the topology name to find more info about the topology
-
-![All topologies](assets/all-topologies.png)
-
-#### Topology Page
-
-Below is the main page to monitor a topology.
-
-1. Name of the topology
-2. [Logical plan](heron-topology-concepts#logical-plan) of the topology
-3. [Physical plan](heron-topology-concepts#physical-plan) of the topology
-4. Health metrics for the topology
-5. General info about the topology
-6. General metrics for the topology
-7. Click components for more details
-8. Click instances for more details
-9. Click on aggregated metrics to color instances by metrics
-10. Link to topology level configs
-11. Link to job page  only if the scheduler provides a link
-   <!-- (TODO: Link to this guide) -->
-12. Link to viz dashboard for this topology only if Tracker is configured with
-   one. <!-- (TODO: Link to this configuration) -->
-
-![Topology1](assets/topology1.png)
-
-![Topology2](assets/topology2.png)
-
-Each node in logical plan can be clicked for more specific info about that
-component.
-
-1. Averaged or max metrics for all instances of this component
-2. Aggregated metrics for all instances of this component
-3. List of all instances and their aggregated metrics
-4. [Instance level operations](#instance-actions-pages), which are described in more details below
-
-![Topology Component](assets/topology-component.png)
-
-Clicking on an instance will highlight that instance in the list.
-
-1. Aggregated metrics are only for this instance
-2. Quick access to logs, exceptions and job pages for this instance
-3. Component counters are still aggregated for all instances
-4. The selected instance is highlighted
-
-![Topology Instance](assets/topology-instance.png)
-
-#### Aggregate Topology Metrics
-
-Selecting a metric will highlight the components and instances based on their
-health with respect to the metric, green being healthy, red indicating a problem.
-This is a quick way to find out which instances are having issues.
-
-![Topology Capacity](assets/topology-capacity.png)
-
-![Topology Failures](assets/topology-failures.png)
-
-#### Config Page
-
-These are the topology configurations <!-- (TODO: Add link to Topology
-Configurations) --> that your topology is configured with. Note that spout and
-bolt level configurations are not part of topology config.
-
-![Config](assets/config.png)
-
-#### <a name="instance-actions-pages">Instance Action Pages</a>
-
-These actions are available for all the instances. They are described in the
-next sections.
-
-![Instance Links](assets/topology-instance-links.png)
-
-#### Logs Page
-
-These are the logs generated by the selected instance. The whole logs file can
-also be downloaded.
-
-![Logs](assets/logs.png)
-
-#### Job Page
-
-Below is the directory view of the container. All instances from a container
-will point to the same job page. Following information is available on this page,
-amongst other things.
-
-1. The jar or tar file associated with this topology
-2. Logs for heron-executor <!-- TODO: Link heron-executor -->
-3. `log-files` folder which has instance logs, as well as `stream manager` or
-   `tmaster` logs.
-
-![Jobpage](assets/jobpage1.png)
-
-![Jobpage logfiles](assets/jobpage2-logfiles.png)
-
-#### Exceptions Page
-
-This page lists all exceptions logged by this instance. The exceptions are
-deduplicated, and for each exception, the page shows the number of times this
-exception occurred, the latest and the oldest occurance times.
-
-![Exceptions](assets/exceptions.png)
-
-#### PID Page
-
-This link can be used to find the process ID for an instance. Since each instance
-runs in its own JVM process, this will be unique for a host. The PID is also
-used for other tasks, such as getting jstack or heap dump for an instance.
-
-![PID](assets/pid.png)
-
-#### Jstack Page
-
-Click on this link to run the `jstack` command on the host against the PID for
-the instance. The output of the command is printed on the page in the browser
-itself.
-
-![Jstack](assets/jstack.png)
-
-#### Memory Histogram Page
-
-Click on this link to run the `jmap -histo` command on the host against the PID
-for the instance. The output of the command is printed on the page in the
-browser itself.
-
-![Histo](assets/histo.png)
-
-#### Memory Dump page
-
-Click on this link to run the `jmap -dump:format=b,file=/tmp/heap.bin` command
-agaist the PID for the instance. Follow the instructions on the page to download
-the heap dump file. This link does not download the file.
-
-![Memory Dump](assets/dump.png)
-
-#### Kill Heron UI server
-
-To kill Heron UI server run the following command:
-
-```bash
-kill $(pgrep -f heron-ui)
-```
-
-To stop all the Heron tools, kill the Heron Tracker as well using `kill $(pgrep -f heron-tracker)`.
diff --git a/website2/website/versioned_docs/version-0.21.2/user-manuals-heron-ui.md b/website2/website/versioned_docs/version-0.21.2/user-manuals-heron-ui.md
deleted file mode 100644
index c293fe1..0000000
--- a/website2/website/versioned_docs/version-0.21.2/user-manuals-heron-ui.md
+++ /dev/null
@@ -1,62 +0,0 @@
----
-id: version-0.21.2-user-manuals-heron-ui-runbook
-title: Heron UI Runbook
-sidebar_label: Heron UI Runbook
-original_id: user-manuals-heron-ui-runbook
----
-<!--
-    Licensed to the Apache Software Foundation (ASF) under one
-    or more contributor license agreements.  See the NOTICE file
-    distributed with this work for additional information
-    regarding copyright ownership.  The ASF licenses this file
-    to you under the Apache License, Version 2.0 (the
-    "License"); you may not use this file except in compliance
-    with the License.  You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
-    Unless required by applicable law or agreed to in writing,
-    software distributed under the License is distributed on an
-    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-    KIND, either express or implied.  See the License for the
-    specific language governing permissions and limitations
-    under the License.
--->
-
-**Heron UI** is a user interface that uses the [Heron Tracker](heron-architecture#heron-tracker) to display detailed,
-colorful visual representations of topologies, including the
-[logical](heron-topology-concepts#logical-plan) and [physical
-plan](heron-topology-concepts#physical-plan) for each topology. Check out
-[Heron UI Usage Guide](guides-ui-guide) for more information about
-various elements that UI exposes.
-
-### Building Heron UI
-
-Heron uses [bazel](http://bazel.io/) for compiling.
-[This page](compiling-overview) describes how to setup bazel
-for heron.
-
-```bash
-# Build heron-ui
-$ bazel build heron/tools/ui/src/python:heron-ui
-
-# The location of heron-ui pex executable is
-# bazel-bin/heron/tools/ui/src/python/heron-ui
-# To run using default options:
-$ ./bazel-bin/heron/tools/ui/src/python/heron-ui
-```
-
-`heron-ui` is a self executable
-[pex](https://pex.readthedocs.io/en/latest/whatispex.html) archive.
-
-### Heron UI Args
-
-* `--port` - Port to run the heron-ui on. Default port is `8889`.
-* `--tracker_url` - The base url for tracker. All the information about the
-  topologies is fetched from tracker. Default url is `http://localhost:8888`.
-* `--address` - Address to listen; Default address is `0.0.0.0`
-* `--base_url` - The base url path if operating behind proxy; Default is [`None`](https://github.com/apache/incubator-heron/blob/master/heron/tools/ui/src/python/main.py#L145)
-
-```bash
-$ heron-ui
-# is equivalent to
-$ heron-ui --port=8889 --tracker_url=http://localhost:8888
-```
diff --git a/website2/website/versions.json b/website2/website/versions.json
index 6ed5017..9da3c49 100644
--- a/website2/website/versions.json
+++ b/website2/website/versions.json
@@ -1,5 +1,4 @@
 [
-  "0.21.1",
-  "0.21.2",
+  "0.20.1",
   "0.20.0"
 ]