document apigw 1.0.0 rc1 (#334)

diff --git a/release-configs/apigateway-1.0.0.config b/release-configs/apigateway-1.0.0.config
new file mode 100644
index 0000000..b9f5605
--- /dev/null
+++ b/release-configs/apigateway-1.0.0.config
@@ -0,0 +1,15 @@
+{
+  "versioning": {
+    "version": "1.0.0",
+    "pre_release_version": "rc1"
+  },
+  "RepoList": [
+    "openwhisk-apigateway"
+  ],
+  "openwhisk_apigateway": {
+    "name": "OpenWhisk API Gateway",
+    "hash": "6fb8fff3bbfaf9fd771375030c9e5a8ff9575894",
+    "repository": "https://github.com/apache/openwhisk-apigateway.git",
+    "branch": "master"
+  }
+}