docs(github-actions): add missing "checkout" step before docker build

[neilime]

Description

Fixing documentation for GitHub Actions section: adding missing actions/checkout step, before building docker images.

To build images we need the Dockerfile to be checked-out. If we don't call the checkout step first, build is failling as it does not find any file: ERROR: failed to build: resolve : lstat tests: no such file or directory

Related issues or tickets

N/A

Reviews

• Technical review
• Editorial review
• Product review

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[crazy-max]

This is not needed as build-push-action builds from Git context by default, see https://github.com/docker/build-push-action/?tab=readme-ov-file#git-context

[crazy-max]

To build images we need the Dockerfile to be checked-out. If we don't call the checkout step first, build is failling as it does not find any file: ERROR: failed to build: resolve : lstat tests: no such file or directory

If you have a repro of this, please open an issue on action's repo, thanks.

[neilime]

To build images we need the Dockerfile to be checked-out. If we don't call the checkout step first, build is failling as it does not find any file: ERROR: failed to build: resolve : lstat tests: no such file or directory

If you have a repro of this, please open an issue on action's repo, thanks.

Ok done: docker/build-push-action#1419