Upgrade Docker build workflow to use buildx with caching

[t0mdavid-m]

Summary

Upgraded the Docker image build workflow to use Docker Buildx with GitHub Actions caching for improved build performance and consistency.

Key Changes

• Updated actions/checkout from v3 to v4
• Replaced raw docker build commands with docker/build-push-action@v6 for both build jobs
• Added docker/setup-buildx-action@v3 to enable Docker Buildx support
• Implemented GitHub Actions cache integration (type=gha) for both full and simple app builds with separate cache scopes
• Configured load: true to load built images into Docker daemon for local testing

Implementation Details

• Each build job now has its own cache scope (full-app and simple-app) to prevent cache conflicts
• Cache mode set to max to maximize cache reuse across builds
• The structured approach using docker/build-push-action provides better integration with GitHub Actions and improved build performance through layer caching

https://claude.ai/code/session_01URHRBGmtAaVif55VvwnjNu

Summary by CodeRabbit

• Chores
  • Optimized Docker image build workflow with enhanced build tooling and intelligent caching strategies to reduce build times and improve CI/CD pipeline efficiency.
  • Upgraded GitHub Actions dependencies to latest stable versions for improved reliability and compatibility.

[coderabbitai]

Caution

Review failed

The head commit changed during the review from 25564c6 to afd5579.

📝 Walkthrough

Walkthrough

The GitHub Actions workflow for building Docker images was updated to use the official docker/build-push-action@v6 with BuildX instead of direct docker build commands. The workflow now includes explicit caching configuration, context/file specifications, and updated action versions across both build jobs.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow Updates .github/workflows/build-docker-images.yml	Replaced docker build commands with docker/build-push-action@v6, added docker/setup-buildx-action@v3, configured cache-from/cache-to caching for both full-app and simple-app builds, set explicit context and file inputs, added load: true flag, and bumped actions/checkout from v3 to v4.

Poem

🐰 A docker build so fine and neat,
With BuildX magic, now complete!
Cache it here, cache it there,
Swift workflows floating through the air! 📦✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main objective of the pull request: upgrading the Docker build workflow to use Buildx with caching, which is the primary change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/cache-docker-builds-6a9kW

📝 Coding Plan

• Generate coding plan for human review comments

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