Convert services to use application name

[TheHackmeister]

I was experimenting calling it the health service, but I think it ultimately makes more sense to call it the prometheus service. Need to update the code to reflect that. Similarly for mqtt -> vernemq, and logs -> loki.

Instead, the service should have a network alias for the generic thing it is providing.

[TheHackmeister]

This approach no longer makes sense. In order to attach networks, secrets, and envs to mqtt for example, the service actually has to be called mqtt and should be left that way.