.NET Framework Docker images support for Windows Server, version 1909

# .NET Framework Docker images support for Windows Server, version 1909

With the release of Windows Server, version 1909 on November 11, 2019, .NET Framework Docker images have been published for Server Core, version 1909.

## Discussion

You can share your thoughts on this change or see what others are saying at:
* [dotnet-framework-docker#448](https://github.com/microsoft/dotnet-framework-docker/issues/448)

## Details

* [dotnet-framework-docker#447](https://github.com/microsoft/dotnet-framework-docker/pull/447)

.NET Framework tags containing the substring `windowsservercore-1909` are now available. You can find the full set of tags on [Docker Hub](https://hub.docker.com/_/microsoft-dotnet-framework).

.NET Framework multi-arch tags, such as `4.8`, have been updated to use `windowsservercore-1909` images if your host is Windows Server 1909 or higher.

### Impacted Repos

* [dotnet/framework/sdk](https://hub.docker.com/_/microsoft-dotnet-framework-sdk/): .NET Framework SDK
* [dotnet/framework/aspnet](https://hub.docker.com/_/microsoft-dotnet-framework-aspnet/): ASP.NET Runtime
* [dotnet/framework/wcf](https://hub.docker.com/_/microsoft-dotnet-framework-aspnet/): Windows Communication Foundation
* [dotnet/framework/runtime](https://hub.docker.com/_/microsoft-dotnet-framework-runtime/): .NET Framework Runtime
* [dotnet/framework/samples](https://hub.docker.com/_/microsoft-dotnet-framework-samples/): .NET Framework Samples