Add comprehensive Docker deployment support:
Docker Infrastructure:
- Multi-stage Dockerfile optimized for amd64 and arm64
- Based on node:20-alpine for minimal size
- Non-root user for security
- Health check endpoint integration
- Volume support for downloads
GitHub Actions Workflow:
- Multi-arch build using native runners (ubuntu-latest for amd64, ubuntu-24.04-arm for arm64)
- Digest-based builds to avoid QEMU emulation
- Automatic push to GHCR (ghcr.io/yachi/yt-dlp-mcp)
- Manifest list creation for multi-platform support
- Semantic versioning support
- Build caching for faster builds
Deployment Files:
- docker-compose.yml for easy local deployment
- .dockerignore for optimized build context
- Comprehensive Docker deployment documentation
Features:
- Native multi-arch builds (no QEMU)
- Automatic GHCR publishing on main branch
- Version tagging (latest, semver, sha)
- Resource limits and health checks
- Production-ready configuration examples
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