#144 Only set PHP_VERSION from docker compose file if it hasn't been set by lakedrops config before

Fix docker execution when no TTY is present

- Copy docker-compose.yml into l3drun if it exists
- Only write to files that are writable
- Update to v2.2.17 of upstream image

- determine composer project name and php version from docker-compose.yml if available
- do not ask for composer downgrade anymore
- l3d should now also work without ssh-auth-sock
- no longer writes to .env if that's read-only

Better default handling also for composer downgrade and php version

Add new command "dir" to show workdir

bitegra/slides#1 Enhance volume.php to allow mounting of subdirectories

Use the original socket for l3drun
Set back the /etc/group approach

Also mount the passwd'ish files into the container