The dev answered me already, hope it works soon.
The Guide also shows how to deploy it via Dockerhub.
It basically does index your normal shares (the ones you want to use with it) and make them accessible like using nextcloud.
But nextcloud for instance destroys my server and is slow af. Maybe 4 Cores are not enough for Nextcloud
My bad. You have to wait for your license file and account, then you get access to the PHP Files needed for the installation.
Btw, its MUUUUUUUCH faster than Nextcloud on my unraid.