chore(deps): update docker/login-action digest to 28fdb31

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker/login-action	action	digest	28218f9 -> 28fdb31

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[github-actions]

Improvements:

1. Pin to Secure Tags:

   • The new Docker Login Action reference (6d4b68b490aef8836e8fb5e50ee7b3bdfa5894f0) is a commit hash, which ensures immutability but makes security monitoring harder compared to a versioned tag. Prefer tagging based on released versions like v2 or v2.1.0 to balance security with maintainability.

   Example:
   yaml
   uses: docker/login-action@v2

2. Registry Environment Validation:

   • Validate that env.REGISTRY is not empty or undefined to avoid potential configuration issues. Consider adding a safeguard step in the workflow to check this.

   Example:

   - name: Check Registry Variable
     run: |
       if [ -z \"${{ env.REGISTRY }}\" ]; then 
         echo \"Error: REGISTRY environment variable is not set\";
         exit 1;
       fi

3. Enhance Security with Secrets:

   • Ensure that username (set to ${{ github.actor }}) does not inadvertently grant unexpected access. Using a predefined secret such as ${{ secrets.REGISTRY_USERNAME }} is more secure.

   Example:

   username: ${{ secrets.REGISTRY_USERNAME }}

4. Carbon and Cost Usage:

   • This specific change does not impact carbon usage directly. However, using a newer action may improve efficiency/performance. Monitor potential price changes for Docker registry usage as improved automation may trigger more frequent builds or pushes.

5. Inline Documentation:

   • Add comments to explain the purpose of the action invocation for better maintainability.

   Example:

   # Logs into the Docker registry to allow push/pull operations

By addressing the above, the workflow will gain improved security, maintainability, and robustness.

[github-actions]

Improvements

1. Reference specific version tags for security and consistency:
   Both the old and new references to docker/login-action use a specific commit hash. While this ensures the reference is immutable, consider switching to a versioned tag for better clarity and maintenance. For instance, if the updated hash corresponds to v2.1.0, use:
   yaml
   uses: docker/[email protected]

   This is easier to track in changelogs and aligns with best practices for maintaining version clarity.
   
   

2. Add a checksum verification step (optional):
   Since uses pulls an action, to enhance security (e.g., mitigating risks from a compromised repository), incorporate checksum verification. GitHub Actions currently lacks built-in checksum validation, but monitoring this in CI pipelines could provide additional security layers.

3. Carbon and cost impact assessment:
   While there's no direct change in carbon footprint or cost here, consider if the newer hash brings a more optimized implementation. Investigate if the new action version reduces runtime or has energy-efficient practices. If so, highlight this benefit in documentation or PR discussions.

4. Document the reason for the hash change:
   It's unclear why a new commit hash is being used (e.g., bug fixes, new features, security patches). Provide a comment or context in the PR to justify this change. This supports maintainability and helps reviewers verify its purpose.

Estimated Impact

• Cost: Likely negligible unless the new version optimizes runtime.
• Carbon Usage: Likely negligible unless the new version significantly impacts process efficiency.