I use plex/overseerr but why would jellyfin require a separate app? Just for login? Iirc overseerr connects to radarr sonarr directly so it should work fine with jellyfin, no?

This is true. I got really good at fixing merge conflicts in college

Centering also doesn’t look great

Buy a used tiny/mini/micro from eBay. Best bang for buck and good efficiency. I got a Dell with a 9500T for $110.

Wouldn’t you be able to cname your domain to the tailscale domain?