Write "how to" content on diagnostic patterns for `non-root` and chiseled images

[richlander]

We've had a number of requests for "how to" content on diagnostic patterns for non-root and chiseled images. We should produce this content, both docs, samples, and blog posts. We'll use this tracking issue for our efforts.

See Secure your container build and publish with .NET 8 to learn what this is all about.

Please feel free to add to this issue on specific scenarios you want addressed.

We also have a request for participation in a related case study at #6082.