Links lead to 404 in samples/build-for-a-platform.md

[Guiorgy]

Links lead to 404 in samples/build-for-a-platform.md:

• Dockerfile.debian-x64
• Dockerfile.alpine-arm64

Edit: Further down, under Conditionalize Dockerfile with --platform, the link to the Dockerfile also leads to 404.

[lbussell]

Thanks for noticing this @Guiorgy. We'll try to get this addressed. If you have any specific questions that our documentation doesn't cover, feel free to open a discussion.

@richlander, we don't have samples for arch-specific Dockerfiles anymore. We should consider re-writing this doc, potentially with a focus on cross-platform builds w/ BuildKit.

[lbussell]

[Triage] We should also consider the use of a markdown linter to help catch invalid links in CI. I will file an issue for that.

[Guiorgy]

Was wandering if catching dead links in CI would be difficult