fix(prod): connect to databases_default network where MongoDB actually runs

docker-compose.prod.yml

@@ -28,7 +28,7 @@ services:
       retries: 10
       start_period: 15s
     networks:
-      - databases_backend
+      - databases_default
       - default
 
 volumes:
@@ -36,5 +36,5 @@ volumes:
   app_tr069_logs:
 
 networks:
-  databases_backend:
+  databases_default:
     external: true