document package-alarms 2.1.0 rc1 (#336)

diff --git a/release-configs/package-alarms-2.1.0.config b/release-configs/package-alarms-2.1.0.config
new file mode 100644
index 0000000..2c5cf3b
--- /dev/null
+++ b/release-configs/package-alarms-2.1.0.config
@@ -0,0 +1,15 @@
+{
+  "versioning": {
+    "version": "2.1.0",
+    "pre_release_version": "rc1"
+  },
+  "RepoList": [
+    "openwhisk-package-alarms"
+  ],
+  "openwhisk_package_alarms": {
+    "name": "OpenWhisk Package Alarms",
+    "hash": "41268181123944aa613d20e95a8d6be17c8b032e",
+    "repository": "https://github.com/apache/openwhisk-package-alarms.git",
+    "branch": "master"
+  }
+}