Auto Backup Dir Env Variable in Docker-Compose.yml about docker-unifi-rpi

[ryansch]

It might be more interesting to add a commented out stanza to the docker-compose config showing how to bind mount a directory to the right place in the container. Thoughts?

[JB09]

Edit: Looking at this further in the dockerfile, it looks like the config named volume is inclusive of the backup directory, but I still think being able to define the "autobackup" directory directly would be useful for those that would like to store this data elsewhere (like a NAS) without tarballing the entire config volume.

[JB09]

That's certainly the easiest way to handle it and is what I did to accommodate my automated backups for the time being. Just unfortunate you can't use a bind mount for a sub-directory of a named volume.