Docker Seafile Pro Migration issue

Dear Community,

I’ve been using a dockerized Seafile Pro for over a year now, without any issues at all. Awesome Software!
Well, it was time for a hardware refresh, so I moved to a new server.
I thought it’ll be an easy job to deploy a new docker container on the new server and just copy all files over from my existant installation, at first it looked like nice but now I can’t access any libraries via the clients on my Mac and iPhone.

Is there maybe something I missed out or a detailed migration guide to follow, for Docker?

Thanks very much!