Quick documentation about the Sites application

README.md

@@ -91,8 +91,14 @@ At this point, Django should run correctly:
     python manage.py runserver
 
 
+Configuration
+=============
+
+You should first setup the `sites` application, in the admin.  The domain name
+configured there is used for outgoing emails.
+
 ISP-specific configuration
-==========================
+--------------------------
 
 The main place to customize Coin for your ISP is the IspDatabase application,
 in the admin.  Information entered in this application has two purposes: