net::ERR_CONNECTION_REFUSED . How to correctly configure Nginx with Socket.io?

Thu Jan 30 13:11:15 UTC 2020

Hi Francis,
thanks for helping.

curl on PC-Server (Ubuntu 18.04.03 Server Edition):

(base) marco at pc:~/vueMatters/testproject$     curl -Iki
http://localhost:8080/
HTTP/1.1 200 OK
X-Powered-By: Express
Accept-Ranges: bytes
Content-Type: text/html; charset=UTF-8
Content-Length: 774
ETag: W/"306-TZR5skx9okrXHMJbxwuiUem3Jkk"
Date: Thu, 30 Jan 2020 09:32:30 GMT
Connection: keep-alive

But from a laptop (Ubuntu 18.04.03 Desktop): 
- https://drive.google.com/open?id=1r56ZApxg3gQLRakKGCwI7CriQbbmfrLh
- https://drive.google.com/open?id=1Dm-PC85pjGfqIeMOS45k3hvV9PANgOH5

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,286850,286862#msg-286862