Add Docker support and debug

- [Narrator] Let's take a look at how we can use…Visual Studio to add Docker support…to an existing application.…Here we have a .NET Core web application…open in Visual Studio 2017.…Let's run the application outside…of a Docker first and take a look at the output.…You're going to press the debug button…up here at the top.…This application shows the current computer name…and operating system.…We'll see this information change…when we run the application inside the container.…Let's stop the debugger,…and let's add Docker support to the application.…

To add Docker support using Visual Studio,…we'll right-click on the project file,…go to add, and click Docker support.…Now, to the right we can see that visual studio…has added some docker composed files…and has also added the Dockerfile.…Let's use the new files to debug our application…inside a container, and then we can take a closer look…at how it all works.…You'll notice at the top…that the debug button has changed to say "Docker"…instead of "IIS Express".…This is because the Docker composed project…