feat: Add Docker registry caching to GitHub Actions build workflow

[jfrench9]

Summary of Changes

This PR enhances the Docker build process in our GitHub Actions workflow by implementing registry caching. The optimization adds caching configuration to improve build efficiency and reduce CI/CD pipeline execution time.

Changes Made

• Added Docker registry cache configuration to .github/workflows/build.yml
• Implemented cache layers to reuse previously built Docker image layers
• Optimized build process to leverage cached dependencies and intermediate build stages

Key UI/UX Improvements

• Faster deployments: Reduced build times lead to quicker feature delivery and bug fixes
• Improved developer experience: Shorter CI/CD feedback loops for faster iteration cycles
• Enhanced reliability: More efficient builds reduce timeout risks and resource contention

Breaking Changes

❌ No breaking changes - This is an infrastructure optimization that doesn't affect application functionality or APIs.

Testing Notes for Reviewers

Validation Steps

1. Workflow Syntax: Verify the YAML syntax is correct and follows GitHub Actions best practices
2. Cache Configuration: Review cache key strategy and ensure proper cache invalidation
3. Build Process: Confirm the caching doesn't interfere with the existing Docker build steps
4. Performance Impact: Monitor initial runs to validate caching effectiveness

Expected Behavior

• First build after merge may take similar time (cache population)
• Subsequent builds should show significant time reduction
• No changes to final Docker image or application behavior

Browser Compatibility Considerations

✅ No impact - This is a CI/CD infrastructure change that doesn't affect client-side code or browser compatibility. The deployed application functionality remains unchanged.

Additional Notes

• This optimization will be most beneficial for frequent builds and rebuilds
• Cache effectiveness will improve over time as more layers are cached
• Monitoring build times before and after this change is recommended to measure impact

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🤖 Generated with Claude Code

Branch Info:

• Source: chore/add-dockerbuild-cache
• Target: main
• Type: feature

Co-Authored-By: Claude noreply@anthropic.com