Clarify that Debian images will not be shipped for .NET 10 (#49953)

* Initial plan

* Clarify that Debian images will not be shipped for .NET 10

Co-authored-by: lbussell <[email protected]>

* Apply suggestions from code review

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: lbussell <[email protected]>
Co-authored-by: Logan Bussell <[email protected]>

Author: Copilot

docs/core/compatibility/containers/10.0/default-images-use-ubuntu.md

@@ -12,7 +12,7 @@ The default Linux distro for .NET tags has been changed from Debian to Ubuntu. T
 - `docker pull mcr.microsoft.com/dotnet/sdk:10.0` - Refers to Ubuntu 24.04 "Noble Numbat"
 - `docker pull mcr.microsoft.com/dotnet/sdk:10.0-noble` - Refers to Ubuntu 24.04 "Noble Numbat"
 
-For more information about the container image platforms available at .NET 10's launch, see [dotnet-docker #6539](https://github.com/dotnet/dotnet-docker/discussions/6539). This change was proposed in [dotnet-docker #6526](https://github.com/dotnet/dotnet-docker/issues/6526).
+Debian container images will not be shipped for .NET 10. For more information about the container image platforms available at .NET 10's launch, see [dotnet-docker #6539](https://github.com/dotnet/dotnet-docker/discussions/6539). This change was proposed in [dotnet-docker #6526](https://github.com/dotnet/dotnet-docker/issues/6526).
 
 ## Version introduced
 
@@ -24,7 +24,7 @@ In .NET 9 and earlier versions, default tags referenced images based on Debian.
 
 ## New behavior
 
-Starting in .NET 10, default tags reference images based on Ubuntu.
+Starting in .NET 10, the default container image tags reference Ubuntu images. Additionally, Debian-based images are no longer provided.
 
 ## Type of breaking change
 
@@ -36,7 +36,9 @@ Debian and .NET release cycles (for mainline support) are the same length, while
 
 ## Recommended action
 
-Test your application. This change is unlikely to affect users.
+Test your application with Ubuntu-based images. This change is unlikely to affect most users.
+
+If you specifically require Debian-based images for .NET 10, you may need to create and maintain custom container images. Please see [installing .NET in a Dockerfile](https://github.com/dotnet/dotnet-docker/blob/main/documentation/scenarios/installing-dotnet.md) for details on how to create your own .NET container images.
 
 ## Affected APIs