title: Can't connect to server on DigitalOcean?
body: <p>tell me please why I can't connect to my server from postman;
  I'm connected to my droplet with SSH, and start my project from the terminal (node app.js). I see in the terminal that everything works fine and my project run on port 4200. But when I try to send a request to my server, Nothing happens. </p>
  
  <p>For example, my server has IP 111.111.111.111, and in postman I use 111.111.111.111:4200/user/login but there is no result. 
  When I do that request for the local project (<a href="http://localhost:4200/user/login" rel="nofollow noreferrer">http://localhost:4200/user/login</a>) everything works fine. </p>