[hotfix] Add makefile
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..768bd60
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,25 @@
+################################################################################
+# 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.
+################################################################################
+
+.PHONY: docker-run
+docker-run:
+ docker run --rm --volume="$PWD:/srv/flink-web" --expose=4000 -p 4000:4000 -it ruby:2.5 bash -c 'cd /srv/flink-web && ./build.sh -p'
+
+.PHONY: docker-rebuild
+docker-rebuild:
+ docker run --rm --volume="$PWD:/srv/flink-web" --expose=4000 -p 4000:4000 -it ruby:2.5 bash -c 'cd /srv/flink-web && ./build.sh'
diff --git a/README.md b/README.md
index 51fbef1..1f6ca8a 100644
--- a/README.md
+++ b/README.md
@@ -7,5 +7,11 @@
You can build the website using Docker such as below (without augmenting your host environment):
```
-docker run --rm --volume="$PWD:/srv/flink-web" --expose=4000 -p 4000:4000 -it ruby:2.5 bash -c 'cd /srv/flink-web && ./build.sh -p'
+make docker-run
+```
+
+And then rebuild the site before merging into the branch asf-site.
+
+```
+make docker-rebuild
```
