Auto-mount connected USB drive, and save all Pleroma data to it

[guysoft]

So the next big step to make PleromaPi plug an play, is to have the user data separated from the SD card.
The idea is you boot with an attached harddrive over USB, and it would mount, and use it as the data source for your instance.

auto-mount-removable module from CustomPiOS can be used to automatically mount, what is now needed is a service that starts before docker-compose, and that handles all the folder creation and setup.