Problem with requests containing domain and port

I have configured Cloudflare zero trust with my nas, linking my domain to my nas with tunnel.

Certain applications work fine and it is possible to access from the outside, but I have a docker that when accessing, internally makes requests to subdomain.mydomainexample.org:6768 and keeps thinking, since it never finds the route. Internally docker works with this port.

Is it possible to redirect this request to subdomain.mydomainexample.org? excluding the port, since I have configured nginx proxy manager so that when it looks for the domain subdomain.mydomainexample.org it takes it to the proper docker.

Thank you and I hope I have explained myself.

Due to my curiosity, why Nginx Proxy Manager over Docker? :thinking:

I use Unraid and it is easy to implement Nginx Proxy Manager with a docker. That is a problem?