How to make one virtual server a proxy

[palomnik]

Operating system Ubuntu Linux 20.04.4
Webmin version 1.994 Usermin version 1.840
Virtualmin version 7.1-1
Webserver: Nginx

I am trying to implement one of my virtual servers as a proxy server as described on this page:

https://jerrington.me/posts/2019-01-29-self-hosted-ngrok.html

Except that I am using port 3000 instead of 3333. I opened that port on the firewall.

Here is the site conf that I am attempting to use:

server {
server_name dev.jshypertext.com www.dev.jshypertext.com;
listen 168.235.85.109;
listen [2604:180:3:5a::83c5];

access_log /var/log/virtualmin/dev.jshypertext.com_access_log;
error_log /var/log/virtualmin/dev.jshypertext.com_error_log;

location / {
  proxy_pass http://localhost:3000/;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header Host $host;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
  proxy_redirect off;
}

error_page 502 /50x.html;
location = /50x.html {
  root /home/dev/public_html;
}

listen 168.235.85.109:443 ssl;
listen [2604:180:3:5a::83c5]:443 ssl;
ssl_certificate /etc/ssl/virtualmin/165608840569596/ssl.combined;
ssl_certificate_key /etc/ssl/virtualmin/165608840569596/ssl.key;
}

It no work! What am I doing wrong?

[calport]

I use Virtualmin to configure the proxy. Look for Edit Proxy Website under Virtualmin → Server Configuration

[palomnik]

Yes that did it! The proxy worked from local docker container to the nginx virtual server, except that the wordpress pages did not render correctly. They render correctly, if using localtunnel, but that service has been down for a few days.