Nightwatch should become easily embeddable monitoring server/library

[ForNeVeR]

Ideally, Nightwatch flow should be as follows:

1. Consider I want to monitor a bunch of my services
2. I do dotnet new nightwatch-dashboard
3. I get a new template application I should set up
4. For example, I may write the following configuration:

   let main _ =
      Nightwatch.AppBuilder()
          .ReadConfiguration("./config.yml")
          .MonitorHttpResource("https://fornever.me")
              .WithTelegramNotification("@fvnever")
          .Run()

That way, every time I want to monitor something, I'll either update the configurations and/or code of my existing monitoring apps or create a new monitoring app from scratch.

Users won't need to tinker with config for one-time activities; everything will be configurable from code and ready for deploy from scratch.