build(docker-compose.yaml): remove web dependency from db

remove depends_on from web to avoid that docker pulls postgresql image even if sqlite is requested

docker/docker-compose.yaml

@@ -7,8 +7,8 @@ services:
 #      dockerfile: ./docker/web/Dockerfile.web
     volumes:
       - ./shared_data:/app/shared_data
-    depends_on:
-      - db
+#    depends_on:
+#      - db
     expose:
       - ${PORT} # Expose port from env variable to an ephemeral port (used by load balancer)
     environment: