Updated config.

Author: malcolmmackay

backendapp/config.py

@@ -61,7 +61,7 @@
 WSB_PORT = os.getenv('WSB_PORT', defaults.WSB_PORT)
 WSB_HOST = os.getenv('WSB_HOST', defaults.WSB_HOST)
 WSB_PROTOCOL = os.getenv('WSB_PROTOCOL', defaults.WSB_PROTOCOL)
-SERVER_NAME = os.environ['SERVER_NAME']
+SERVER_NAME = os.getenv('SERVER_NAME', "{host}:{port}".format(host=WSB_HOST, port=WSB_PORT))
 
 PREFERRED_URL_SCHEME = WSB_PORT.replace("://", "")