share volume for backend (for dev)

docker-compose.override.yml

@@ -37,6 +37,7 @@ services:
       context: .
     image: registry.gitlab.com/champs-libres/geonature-citizen/back
     volumes:
+      - ./vendor/GeoNature-citizen/backend/gncitizen/:/home/appuser/citizen/backend/gncitizen/
       - ./patches/settings.ini:/home/appuser/citizen/config/settings.ini
       - ./patches/back/default_config.toml:/home/appuser/citizen/config/default_config.toml
       - ./patches/back/wsgi.py:/home/appuser/citizen/backend/wsgi.py