Feature Request

What challenge are you facing?

What is the proper way to configure btrfs when running Concourse in Docker? I'm using the recommended docker-compose.yml from the documentation. I've already set CONCOURSE_BAGGAGECLAIM_DRIVER: btrfs, but what else? Do I need to set up Docker with btrfs volume driver? Maybe format a block storage to btrfs and mount it to Concourse somehow to avoid /dev/loop0 etc.

A Modest Proposal

Running Concourse in Docker might be documented better, including different options that can be useful in docker-compose.yml.