Multi-Platform image with GitHub Actions examples using `/tmp`

[awharn]

Is this a docs issue?

• My issue is about the documentation content or website

Type of issue

Other

Description

The documentation for distributing the build across multiple runners uses /tmp to store the digests.

However, on self-hosted runners, this location will fill up with digests from other docker builds, resulting in build failures. This may also apply for the With Bake example.

Location

https://docs.docker.com/build/ci/github-actions/multi-platform/

Suggestion

I believe references to /tmp should be replaced with ${{ runner.temp }} to make the example more compatible with self-hosted runners.

[docker-robot]

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