Use commit hash for image tag

[montaguethomas]

Description:

Currently all published images can only be referenced by image digest. These image digests cannot be linked to the actual commit or tag it was built for. The workflow recommends to use the GITHUB_REF_NAME environment variable for the tag. Unforuntiatly that value would end up being just the branch name of master. Instead suggest to use the GITHUB_SHA variable to tag every image built with the commit hash. This change will still tag the head of the master branch as latest.

Rationale:

By using the git reference variable for the tag, it makes it clear which commit/tag the image was built from in the image versions list: https://github.com/ComplianceAsCode/content/pkgs/container/k8scontent/versions

[openshift-ci]

Hi @montaguethomas. Thanks for your PR.

I'm waiting for a ComplianceAsCode member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

Fedora Environment

Oracle Linux 8 Environment

[codeclimate]

Code Climate has analyzed commit af429e2 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 58.4%.

View more on Code Climate.

[marcusburghardt]

/packit build

[yuumasato]

LGTM, thanks!