Update GitHub Container Registry login credentials in workflow

[johlju]

This change is 

[coderabbitai]

Walkthrough

The GitHub Actions workflow for Docker image publishing was updated to change the authentication method for the GitHub Container Registry. The workflow now uses explicit secrets for the registry username and password instead of the previously used GitHub actor and default token.

Changes

File(s)	Change Summary
.github/workflows/docker-publish.yml	Updated Docker registry login step to use GHCR_USERNAME and GHCR_TOKEN secrets for authentication.

Sequence Diagram(s)

sequenceDiagram
    participant GitHub Actions
    participant GHCR (ghcr.io)
    Note over GitHub Actions: Start Docker publish workflow
    GitHub Actions->>GHCR (ghcr.io): Login using GHCR_USERNAME & GHCR_TOKEN secrets
    GHCR (ghcr.io)-->>GitHub Actions: Authentication response
    Note over GitHub Actions: Proceed with Docker build and publish steps

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Reviewing files that changed from the base of the PR and between f0beeb6 and 29091a3.

📒 Files selected for processing (1)

• .github/workflows/docker-publish.yml (1 hunks)

🔇 Additional comments (1)

.github/workflows/docker-publish.yml (1)

39-40: Double-check secret presence & scopes for GHCR_USERNAME / GHCR_TOKEN.

• These secrets must exist at the repo or org level; if they are missing the job will fail at the login step.

• Make sure GHCR_TOKEN is a PAT with “write:packages” (and nothing broader) to avoid over-privileging.

• Unless you intentionally need a custom username, you can still rely on the built-in
username: ${{ github.actor }} and password: ${{ secrets.GITHUB_TOKEN }} combination, which works for GHCR and avoids maintaining an extra PAT.

No change required if the new secrets are already in place—just confirm before merging.

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