feat: Add Docker support and health endpoint

- Add production-ready Dockerfile with multi-stage build
- Add .dockerignore for optimized builds
- Add docker-compose.yml for easy deployment
- Add /health endpoint for container health checks
- Update README with comprehensive Docker documentation
- Include security best practices (non-root user, health checks)
- Support for both development and production deployments

.dockerignore

@@ -0,0 +1,93 @@
+# Dependencies
+node_modules
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Environment files
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Build outputs
+dist
+build
+.next
+out
+
+# Development files
+.vscode
+.idea
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Git
+.git
+.gitignore
+
+# Docker
+Dockerfile
+.dockerignore
+docker-compose.yml
+docker-compose.yaml
+
+# Documentation
+README.md
+docs/
+*.md
+
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# ESLint cache
+.eslintcache
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# Temporary folders
+tmp/
+temp/