adds a README

Author: fxn

README.md

@@ -0,0 +1,11 @@
+# Rails Master Hook
+
+This is the webhook that runs in the docs server. When invoked, it triggers docs generation and the contrib app gets updated.
+
+Server management in encapsulated in the script `bin/server`:
+
+    bin/server start
+    bin/server restart
+    bin/server stop
+
+This webhook just touches a file meaning "we have been called". The docs server is responsible for monitoring the presence of said file somehow, and act accordingly.