@mothwaves any URL that you can access locally on the server (outside of docker), nginx will be able to reverse proxy, since that’s basically what it does, just send the requests on.
so if you can see the URL with curl or with a browser, it should be fine.
the only real complication there is docker networking, where you need to explicitly list ports to expose and i think you might need to use a hostname other than localhost, but i’ve mostly used host networking (just make sure your firewall is set up to block incoming connections to the port, just allow nginx to access it locally)