Hint for the needed configuration of a production environment

Author: Sharaal

README.md

@@ -10,5 +10,8 @@
   - npm run watchify
 - Git commit/push into the master after changes
 
+## Production
+- Set environment variable "NODE_ENV" to "production" to enable express internal optimizations
+
 ## Try it online
 http://angularjs-skeleton.herokuapp.com/