add link about switching container types (#20208)

Clear up confusion about switching to windows containers. I initially got stuck on this step.

Author: aproulx232

aspnetcore/host-and-deploy/docker/building-net-docker-images.md

@@ -84,7 +84,7 @@ The sample Dockerfile uses the [Docker multi-stage build feature](https://docs.d
 
 ## Run in a Linux container
 
-* In the Docker client, switch to Linux containers.
+* In the Docker client, [switch to Linux containers](https://docs.docker.com/docker-for-windows/#switch-between-windows-and-linux-containers).
 
 * Navigate to the Dockerfile folder at *dotnet-docker/samples/aspnetapp*.
 
@@ -110,7 +110,7 @@ The sample Dockerfile uses the [Docker multi-stage build feature](https://docs.d
 
 ## Run in a Windows container
 
-* In the Docker client, switch to Windows containers.
+* In the Docker client, [switch to Windows containers](https://docs.docker.com/docker-for-windows/#switch-between-windows-and-linux-containers).
 
 Navigate to the docker file folder at `dotnet-docker/samples/aspnetapp`.
 
@@ -259,4 +259,4 @@ As noted in the preceding Dockerfile, the `*.csproj` files are copied and restor
 The Git repository that contains the sample app also includes documentation. For an overview of the resources available in the repository, see [the README file](https://github.com/dotnet/dotnet-docker/blob/master/samples/aspnetapp/README.md). In particular, learn how to implement HTTPS:
 
 > [!div class="nextstepaction"]
-> [Developing ASP.NET Core Applications with Docker over HTTPS](https://github.com/dotnet/dotnet-docker/blob/master/samples/run-aspnetcore-https-development.md)
+> [Developing ASP.NET Core Applications with Docker over HTTPS](https://github.com/dotnet/dotnet-docker/blob/master/samples/run-aspnetcore-https-development.md)