missed a spot

docs/readme.md

@@ -8,3 +8,9 @@
 ###[Getting started](http://peerjs.com/start)
 
 ###[Browser compatibility and limitations](http://peerjs.com/status)
+
+
+## Problems?
+
+Discuss PeerJS on our Google Group:
+https://groups.google.com/forum/?fromgroups#!forum/peerjs