Create demo app environment

app/config.py

@@ -415,10 +415,13 @@ class Production(Config):
 class Staging(Production):
     pass
 
+class Demo(Production):
+    pass
 
 configs = {
     'development': Development,
     'test': Test,
     'staging': Staging,
+    'demo': Demo,
     'production': Production
 }