Reorganize repository structure with src/ folder and add Docker support with CI/CD

[Copilot]

Summary

This PR reorganizes the entire repository structure to improve code organization and adds comprehensive Docker support with automated CI/CD workflows.

Changes Made

📁 Repository Structure Reorganization

• Created src/ folder to contain all source code
• Moved code directories to src/:
  • exercises/ → src/exercises/ (lab sample works)
  • project/ → src/project/ (actual project submissions)
  • starter/ → src/starter/ (starter code templates)
  • ci-scripts/ → src/ci-scripts/ (CI/CD utilities)
• Kept essential docs in root:
  • README.md, LICENSE, .gitignore
  • images/ (certificates and documentation)
  • Configuration files (.angulardoc.json, .travis.yml, etc.)

📝 Documentation Updates

• Updated README.md with new folder structure and paths
• Added DOCKER.md with comprehensive Docker usage instructions
• Updated all project links to reference new src/ paths

🐳 Docker Support

• Created main Dockerfile with multi-stage build support
• Added .dockerignore for optimized builds
• Supports building any Node.js project in the repository via build args:

  docker build --build-arg PROJECT_PATH=src/project/image-filter-udagram-app -t udacity-image-filter .

🚀 GitHub Actions CI/CD

• Updated existing workflows to use new src/ paths
• Fixed build commands to use available scripts (tsc vs build)
• Added comprehensive Docker build/publish workflow (docker-build-publish.yml):
  • Builds multiple project variants automatically
  • Publishes to GitHub Container Registry (ghcr.io)
  • Supports both main Dockerfile and individual project Dockerfiles
  • Includes proper tagging (branch, semver, SHA)
  • Matrix strategy for building multiple projects simultaneously

🔧 Build Improvements

• Verified all builds work with new structure
• Updated workflow commands to match available npm scripts
• Added safety checks in Docker workflow to only build projects with package.json

Testing

✅ Verified npm builds work in new structure:

• src/exercises/udacity-c2-basic-server - npm ci + tsc ✓
• src/project/image-filter-udagram-app - npm ci + build ✓

✅ Docker builds validated with new Dockerfile structure

✅ GitHub Actions workflows updated and tested

Impact

This reorganization provides:

1. Better code organization with clear separation of concerns
2. Cleaner root directory with only essential documentation
3. Full Docker support for containerizing any project
4. Automated CI/CD for Docker image builds and publishing
5. Improved maintainability with consistent structure

Container Images

The following images will be automatically built and published:

• ghcr.io/nithinmohantk/udacity-aws-developer-project-workspace/image-filter-udagram
• ghcr.io/nithinmohantk/udacity-aws-developer-project-workspace/udacity-c2-frontend
• ghcr.io/nithinmohantk/udacity-aws-developer-project-workspace/udacity-c2-restapi-feed
• ghcr.io/nithinmohantk/udacity-aws-developer-project-workspace/udacity-c2-restapi-user

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[nithinmohantk]

all looks good.