Tor leaves unused volumes behind

[kroese]

I noticed for a long time that my docker volumes list keeps growing at a rapid pace with unused empty volumes.

I think I pinpointed it down to the Tor container leaving these behind after every reboot. I know docker has a command to prune unused volumes, so that is what I run now from time to time, but it would be best if Umbrel prevented their creation or at least cleaned them up when stopping.