Well, that means that Nginx is running properly. It’s just not directing to your web app properly. I would check to see that the forever process is running with forever list, then running the logs with tail -f ~/logs/forever.log. From that it can be a variety of errors that may be causing Nginx to not see your app. You may have to reconfigure the nginx configuration for the app as well and then restart with sudo service nginx restart. Hope this helps!