Sorry. I'm mixing us both up. I meant "docker inspect nginxproxymanager". 192.168.48.3 is definitely not typical for a docker IP, but let's go with that for the port forwarding rule.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)