Migratinging from Emby Server as a package to a docker install/deployment

[jerkrl 4]

Hi,

On my Synology DS720+, I have Emby Server installed as a package.
I'm trying to migrate my Emby Server to a docker container installment (deployment), as I intend to move my Emby Server from my Synology to a linux server that is more powerfull.
I would like to do so, while keeping all the info/data of my current (package) installment and have them used after I have deployed the docker container. Effectively, Emby Server as it was before without any additional setup required, as it is the exact same server.

I tried, but... it gives me the first-time-setup page.

What I have done till now:

1. Stop the package
2. Copy everything in @appdata/EmbyServer to the new location where my docker containers are residing
   
   cp -ar /volume2/@appdata/EmbyServer/* /volume2/docker/emby_server/
    
3. Set the ownership:

chown -R 1026:100 /volume2/docker/emby_server/
chmod -R 775 /volume2/docker/emby_server/

1. Confirm all is copied
2. Start the Emby Server docker container
3. Go to http://192.x.x.x:8096
4. "Welcome to Emby
   This wizard will help guide you through the setup process of setting up Emby Server."

So, my approach is not fully working.
What am I doing wrong?