nginx.conf

server {
        listen 80;
        listen [::]:80;
        server_name <domain name>;

        root <files location>;

        location / {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:<port>;
        }

        location /socket.io/ {
                proxy_pass http://127.0.0.1:<port>;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
        }
}

Change these values

<domain name>
Example: csg0.trade www.csg0.trade

<files location>
Example: /home/csg0.trade

<port>
Example: 8080