DATA_DIR takes the files and PGDATA_DIR the database, so the database can
stay on a filesystem that supports ownership when the files live on a disk
that doesn't. The example .env points both at /Volumes/Data/printhive.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The database and files now live under ./data (DATA_DIR to move them), so
they can be seen, backed up and restored without going through Docker.
tools/volumes-to-folders.sh copies an existing install's named volumes
across; it only copies, leaving the volumes in place.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>