Mirror operator image to Gamewarden registry on tag push

[esarafianou]

Summary

After pushing the operator image to Docker Hub, also publish it to the Gamewarden Harbor registry.

Ticket Link

N/A

Release Note

NONE

[coderabbitai]

📝 Walkthrough

Walkthrough

The continuous delivery workflow adds authentication to the Gamewarden Harbor registry and mirrors the built operator Docker image from the Mattermost registry to the Gamewarden registry on every tag push.

Changes

Image Mirroring to Gamewarden Registry

Layer / File(s)	Summary
Workflow Configuration .github/workflows/cd.yml	Two new steps added to the build job: (1) authenticate to registry.gamewarden.io using Gamewarden registry credentials; (2) copy the operator image from mattermost/mattermost-operator:${{ github.ref_name }} to registry.gamewarden.io/mattermost/mattermost-operator:${{ github.ref_name }} via docker buildx imagetools create.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and specifically describes the main change: mirroring the operator image to Gamewarden registry on tag push.
Description check	✅ Passed	The description is directly related to the changeset, clearly explaining the purpose of publishing the operator image to Gamewarden Harbor registry.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch gamewarden

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/workflows/cd.yml:
- Around line 47-52: The workflow currently mirrors a mutable tag (in job
cd/push-operator-to-gamewarden) which can drift; resolve the source image digest
first using docker buildx imagetools inspect and the correct template field
.Manifest.Digest (capture into a variable like SRC_DIGEST), then mirror using
the stable repo@sha256:... reference instead of the tag so the push to
registry.gamewarden.io/mattermost/mattermost-operator uses the resolved digest;
ensure the inspect command uses --format '{{.Manifest.Digest}}' (not
'{{.Digest}}') and replace the source argument in the imagetools create step
with the repo@${SRC_DIGEST} form.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: fc6affad-1f46-4426-8a00-a7841b688d79

📥 Commits

Reviewing files that changed from the base of the PR and between 95f6b8a and 29041f0.

📒 Files selected for processing (1)

• .github/workflows/cd.yml

[esarafianou]

@coderabbitai resolve

[coderabbitai]

✅ Actions performed

Comments resolved and changes approved.