URL Always prompts with server selection

[noah-pm-dev]

Setup:
Domain directs to a raspberry pi running nginx. If domain has the /jellyfin/ subpath, it is proxied to a different server on the same network at http:// localip:8096/web/. That server is running jellyfin via the docker container. Currently HTTPS redirects to HTTP when accessing jellyfin, as jellyfin requires certs to use the HTTPS port but those certs are not on the same device as jellyfin.

Current Behavior:
If I navigate to http:// localip:8096/web/, I get sent straight to the sign in page, or if I am already signed in, straight to jellyfin with all my movies and shows.

Problem:
If I instead navigate to https:// domain .com/jellyfin/, I am sent to the "select server" page. If I then select  https:// domain .com/jellyfin/ as my server, it says that the server cannot be found. This makes no sense to me, as the very fact that I am seeing a jellyfin page in the first place must indicate that I am connected to the jellyfin instance that is running on the server right next to me.
Additionally, I cannot access the server from the android app (and I assume anywhere else).

What should I do to fix this issue?

[TheDreadPirate]

If you are using a subpath in Nginx, you also need to match that subpath in Jellyfin. The "baseurl" field.

And Nginx would need to be setup accordingly. Not just for the server_name, but also the proxy_pass would need to include the /jellyfin subpath. Another consideration is adding a 302 redirect so that anyone that types in /jellyfin will be redirected to /jellyfin/.