don't let `make clean` destroy the user's settings
don't let `make clean` destroy the user's settings

The docker-compose env files might contain operator-created content not reproducible from other files.
geometalab/drf-utm-zone-info,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/drf-utm-zone-info