I think the YAML anchors section would lead to an unparseable compose file? No `services` block above the `api` and `web` services, on the same level as `x-app

I think the YAML anchors section would lead to an unparseable compose file? No `services` block above the `api` and `web` services, on the same level as `x-app:`. So the `<<: *default-app` anchor won't be recognised as the block that defines it is never terminated prior to use? (I've not tested as currently on the windows gaming box. this is purely from reading it, so happy to be corrected).