Elaborate on Part 5 (Docker deployment)

[micolous]

Part 5 talks about Docker deployment, but in it it's really taking the microsoft/dotnet image then running the .NET Core Console Application manually inside of that environment.

It would be good to elaborate on this a little and talk about creating a new Dockerfile with some existing ASP.NET Core application, and being able to run the container and automatically expose the webserver from inside of that container.