fix: update PostgreSQL and Authentik tags in env.prod.template for consistency

refactor: remove unused volumes from postgresql service in docker-compose files

docker-compose.override.yml

@@ -13,8 +13,6 @@ services:
 
   postgresql:
     image: docker.io/library/postgres:${POSTGRES_TAG:?POSTGRES_TAG is not configured}
-    volumes:
-      - database:/var/lib/postgresql/data
     networks:
       - backend