title: Socketio not connecting on postman socket connection ui on localhost
body: <pre><code>Could not connect to localhost:3000
  17:02:53
  Error: Unexpected server response: 404
  Handshake Details
  Request URL: http://localhost:3000/socket.io/?EIO=3&amp;transport=websocket
  Request Method: GET
  Status Code: 404 Not Found
  </code></pre>
  <p>My express server listen on 3000 port and socketio http on 443 port, i am able to connect socket by hosting this on ec2 instance and using ec2 ip with port number on postman socket connection ui, but on localhost connection always failed with above error on postman socket beta ui.</p>