Pin golang Docker tag to fc2cff6

[KubeArchitectBot]

This PR contains the following updates:

Package	Type	Update	Change
golang	final	pinDigest	-> fc2cff6

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot.

[claude]

Claude finished @KubeArchitectBot's task —— View job

---

Code Review Complete

I've thoroughly reviewed this pull request that pins the golang Docker tag to a specific digest. Here's my analysis:

Todo List:

• Read project guidelines (CLAUDE.md)
• Examine the Dockerfile changes
• Analyze security implications of Docker tag pinning
• Review maintenance and best practices considerations
• Provide comprehensive feedback

Review Findings

✅ Security - Excellent Improvement

• Immutable Builds: Pinning to digest fc2cff6 ensures reproducible builds and prevents supply chain attacks
• Prevents Tag Mutation: The golang:1.24-alpine tag could be updated maliciously, but the digest cannot be changed
• Aligns with Security Best Practices: This follows the principle of using immutable references for production containers

✅ Code Quality - Good

• Clean Change: Single-line modification with clear intent
• Proper Syntax: Correct Docker digest syntax (@sha256:...)
• Maintains Functionality: No breaking changes to the existing build process

⚠️ Maintenance Considerations

• Manual Updates Required: Security patches and updates to golang:1.24-alpine will require manual intervention
• Monitoring Needed: The team should track upstream updates to avoid missing critical security patches
• Renovate Automation: The current Renovate configuration with automerge enabled helps mitigate this concern

✅ Performance - No Impact

• No Performance Changes: This change doesn't affect runtime performance
• Build Cache: Docker layer caching remains effective with digest pinning

❓ Test Coverage - Not Applicable

• No Tests Needed: This infrastructure change doesn't require additional test coverage
• CI Verification: The existing CI pipeline (backend/Dockerfile:1) will validate the build still works

Recommendations

1. Approve This Change: The security benefits outweigh the maintenance overhead
2. Monitor Renovate: Ensure the bot continues to provide timely updates for security patches
3. Consider Documentation: The CLAUDE.md mentions "Container-First Development" - consider documenting the digest pinning strategy

Summary

This is a low-risk, high-value security improvement. The change follows container security best practices by ensuring immutable, reproducible builds. While it increases maintenance overhead slightly, Renovate's automation and automerge configuration adequately addresses this concern.

Recommendation: ✅ Approve and merge

---