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

- 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

#139 Change into project directory before doing anything else, if l3d gets called with an existing project ID

Also silence the copy command when existing config gets copied into l3drun

Add /drupal/vendor/bin to the PATH env variable

Add support for Drupal 10

#121 Copy optional .lakedrops.yml into l3drun for further processing instead of using its content as an environment variable