How to redirect subdomain to specific port

Hi!

I have docker installer on my OMV with a deluge container.

I'm reaching deluge by writing my "publicIP:8112"

I have just bought a domain and would like to reach this "publicIP:8112" by writing "deluge.mydomain.fr"

I use cloudflare to proxy A my publicIP to mydomain.fr and created a redirection in Cloudflare to redirect deluge.mydomain.fr to my publicIP

Could you tell me how to set the parameters in nginx to redirect deluge.mydomain.fr to localhost:8112 or publicIP:8112

If not possible then mydomain.fr/deluge to localhost:8112

Thank you for your help

Thank you for your answer but it does'nt seem simple at all the configuration of this container.

my Openmediavault webgui is reachable on ports 80 and 443. I thought there was a simple way to to do the job.

Openmediavault webgui should have a page to set these redirections easily without using codes and lines.

I'm sorry but isn't the webgui of openmediavault a webserver?

is it not possible to add lines in the openmediavault-webgui file inside /etc/nginx/sites-enabled to redirect subdomain name to a port?

I have installed the webdav plugin. When I write mydomain/webdav, it redirects to webdav.

I just would like to understand the difference between a real webserver and the openmediavault webgui.

thank you for your time