This is the output of the "Network" tab : https://drive.google.com/open?id=1QJMe8FEBrEuWacHWeJ_TQegMkF0v68AY
" Either a http redirect response header, or some response body content, invites the browser to try to access localhost" :
as far as I see and understand, the requested URL, or the URL to which the initial request is redirected, from the initial https://ggc.world , is:
Request URL: https://localhost/sockjs-node/info?t=1580484448072

So...
I ask you... am I right or wrong in thinking that this proxy_pass address has to be changed?

server {
listen 443 ssl http2 default_server;
server_name ggc.world;

ssl_certificate /etc/ssl/certs/chained.pem;
ssl_certificate_key /etc/ssl/private/domain.key;
ssl_session_timeout 5m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
ssl_ciphers EECDH+CHACHA20:EECDH+CHACHA20-draft:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RS$
ssl_prefer_server_ciphers on;
ssl_session_cache shared:SSL:50m;
ssl_dhparam /etc/ssl/certs/dhparam.pem;
#ssl_stapling on;
#ssl_stapling_verify on;

access_log /var/log/nginx/ggcworld-access.log combined;

add_header Strict-Transport-Security "max-age=31536000";
location = /favicon.ico { access_log off; log_not_found off; }
location / {
proxy_pass http://127.0.0.1:8080; // <------------------------------------------------- !!!!
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}

And how to change it?