Add example of how to build multi-platform images natively using Github ARM runners

[dmohns]

Description

Hey all 👋

Github Recently announced ARM runners https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/

We can use this to to distribute builds across runners with matching platform/arch in this example: https://docs.docker.com/build/ci/github-actions/multi-platform/#distribute-build-across-multiple-runners This way we no longer need to rely on QEMU for building ARM, which is very slow.

Maybe it would be great to adapt the example in the docs accordingly.

Would you like to contribute this guide?

• Yes

[crazy-max]

We opened #21854 to solve this issue but we prefer to wait for these runners to be GA before publishing this to our docs. But feel free to try it and let us know: https://deploy-preview-21854--docsdocker.netlify.app/build/ci/github-actions/multi-platform/#distribute-build-across-multiple-runners