Update readme

README.md

@@ -1,2 +1,18 @@
-# otalk webrtc capable xmpp, in the browser 
+# otalk 
+
+webrtc capable xmpp, in the browser 
+
+## Setup
+
+Until we get a proper login screen, modify and save this to `localStorage.config`:
+
+    {
+        "jid": "USER@HOST",
+        "server": "HOST",
+        "wsURL": "wss://WSURI",
+        "credentials": {
+            "username": "USER",
+            "password": "PASSWORD"
+        }
+    }