After running the Dockerfile, the image needs three things:
Port 80/tcp -> 80
Port 80/udp -> 80
Port 443/tcp -> 443
Port 443/udp -> 443
Directory /owntracks-storage -> /owntracks-storage
It should autoconfigure and by default only be accessible on localhost
You can change this and other stuff in the /owntracks-storage/configuration.conf file.