Here's what I did to get it running:
Pointed /config to a lidarr folder in appdata like you do with every other docker.
Pointed /music to the folder where the music is stored.
/data does not seem to do anything but I pointed it to the same folder as /config
Added the container path /downloads and pointed it to the downloads folder.
Added the variable PUID and set it to 99.
Added the variable PGID and set it to 100.
I recommend joining the lidarr discord for support.