Updated container has gone all wrong

[Femur4889]

I simply want to make my updated JF container behave exactly like my old established installation did.

I'm really at a loss with what to do, I've troubleshot this for hours but nothing works. 

I had not used Jellyfin in quite some time. I updated the docker container using docker compose. The container loaded but when I entered into Jellyfin on my server, none of the media files were there and my original Username/Password combo did not work.

I do not want to lose all the metadata/info which was associated with my old server.

I am certain that my media path is correct. My existing /config and /cache files are currently in the same place they've always been. My existing /media has been moved to a local ZFS array and I have changed the path's settings in the docker compose file.

version: '3.5'
services:
  jellyfin:
    image: jellyfin/jellyfin
    container_name: jellyfin
    #user: 1000:1000
    network_mode: 'host'
    volumes:
      - /mnt/500gb/docker/jellyfin/configconfig
      - /mnt/500gb/docker/jellyfin/cachecache
      - type: bind
        source: /mnt/gator1/Jellyfin/
        target: /media
        read_only: true
    restart: 'unless-stopped'
    extra_hosts:
      - 'host.docker.internal:host-gateway'

If anyone can assist I'd be most grateful.