express-8.x-1.x-dev/demo_express/config/install/system.maintenance.yml

message: '@site is currently under maintenance. We should be back shortly. Thank you for your patience.'
langcode: en
_core:
  default_config_hash: Z5MXifrF77GEAgx0GQ6iWT8wStjFuY8BD9OruofWTJ8