Sebastian Krüger 365b8ed328 ci: add Docker build and GitHub Container Registry workflow ...

Add complete Docker containerization and CI/CD setup:

Docker Configuration:
- Multi-stage Dockerfile with 3 stages (deps, builder, runner)
- Stage 1: Install dependencies with pnpm in Alpine
- Stage 2: Build Next.js static export
- Stage 3: Serve static files with nginx:alpine
- Health check endpoint on /health
- Optimized for production with layer caching

Nginx Configuration:
- Custom nginx.conf for static file serving
- Gzip compression enabled
- Security headers (X-Frame-Options, X-Content-Type-Options, etc.)
- Static asset caching with 1-year expiry
- Client-side routing support (try_files)
- Health check endpoint for container orchestration
- Error page handling

GitHub Workflow (docker-build-push.yml):
- Triggers on push to main, tags, and pull requests
- Multi-platform builds (linux/amd64, linux/arm64)
- Pushes to GitHub Container Registry (ghcr.io)
- Automatic tagging: latest, semver, sha, branch
- Uses GitHub Actions cache for faster builds
- Requires only GITHUB_TOKEN (no secrets needed)

.dockerignore:
- Excludes node_modules, .next, build artifacts
- Excludes dev files, logs, and IDE configs
- Keeps Docker image size minimal

Image will be available at:
ghcr.io/valknarness/units-ui:latest

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

2025-11-08 09:32:42 +01:00

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