Migrate postgresql and improve skeleton

docker-compose.override.dev.template.yml

@@ -18,6 +18,8 @@ services:
       - PHP_FPM_USER=1000
       - PHP_FPM_GROUP=100
       - COMPOSER_HOME=/var/www/app/.composer
+      # this is required to run tests with database from vendor/chill-project/chill-bundles directory
+      - DATABASE_URL=postgresql://postgres:postgres@db:5432/postgres?serverVersion=14&charset=utf8
     links:
       - smtp
 
@@ -26,9 +28,11 @@ services:
       - .:/var/www/app
 
   db:
-    image: postgis/postgis:12-3.1-alpine
     volumes:
       - ./docker/db/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
+        # if you prefer to store the data somewhere into your user path, instead of the docker's path
+        # this is useful not to loose data when you run `docker container prune` or `docker volume prune`
+      - /path/to/your/db/data:/var/lib/postgresql
     ports:
       - "127.0.0.1:5432:5432"
     environment: