Jellyfin next to HASS OS Through NGINX

[Darkyputz]

Hello everyone...

I am new to Jellyfin and i hope i am not asking to silly questions...
I treid the search already but wasnt successful.
So first my setup:
I am running HomeAssistant on a lenovo mini that has a working Duckdns/Nginx setup running to expose my HASS to the world...and make it useable for the App.
No i installed Jellyfin on my NAS (an old Netgear Pro6) that is running OMV7 and Jellyfin is installed and running via Compose...
So far so good and it looks like that it is working fine in the local lan.
But the original idea is/was to use Jellyfin to make my music and video available to the Jellyfin app on my fon, so that i have all my stuff with me.
So i was looking at the NGINX that i am running and it is set to send all traffic from url xyz on port 443 to the internal port 80.
But thats it...
Does anyone have more knowledge about NGINX to actually expose more than one service?

Every help would be highly appreciated

Greetings from NJ

Please let me know if any other/,ore info is needed...i just dont know right now what info could be helpful