fix(pipeline): add default network to app container so it can reach postgres db

docker-compose.yaml

@@ -3,6 +3,7 @@ services:
     image: registry.infra.mintel.me/mintel/mb-grid-solutions:${IMAGE_TAG:-latest}
     restart: always
     networks:
+      - default
       - infra
     env_file:
       - ${ENV_FILE:-.env}