GitHub Templates:
- Add issue templates (bug report, feature request, question)
- Add comprehensive pull request template
- Standardize community contributions

Community Guidelines:
- Add CODE_OF_CONDUCT.md (Contributor Covenant v2.1)
- Add SECURITY.md with vulnerability reporting process
- Document security best practices and limitations
- Establish enforcement guidelines

Build & Development Tools:
- Add Makefile with 25+ commands for common tasks
- Add help, install, build, run, test, format, lint targets
- Add Docker, backup, and CI convenience commands
- Simplify development workflow

Docker Support:
- Add multi-stage Dockerfile (build + runtime ~50MB)
- Add docker-compose.yml for easy deployment
- Add .dockerignore for optimized builds
- Add comprehensive Docker guide (docs/DOCKER.md)
- Run as non-root user for security
- Support volume mounting for data persistence

Examples & Demos:
- Add sample_posts.json with 5 example posts
- Add demo.exs script showing API usage
- Add import_examples.sh for quick setup
- Make scripts executable

Documentation:
- Add complete API documentation (docs/API.md)
- Document all public functions with examples
- Add type specifications and usage patterns
- Add error handling guidelines
- Update README with badges and quick links
- Add Docker and Makefile usage sections
- Add documentation navigation section

README Enhancements:
- Add status badges (CI, License, Elixir, OTP, PRs)
- Add documentation index with quick links
- Add Docker installation instructions
- Add Makefile usage examples
- Add example posts import instructions
- Improve navigation and discoverability

Developer Experience:
- One-command setup: make setup
- One-command quality checks: make quality
- One-command CI validation: make ci
- Docker-based development option
- Comprehensive help via make help
- Example data for testing features

Total Files Added: 16
Total Lines Added: ~2500

IDE & Editor Support:
- Add .editorconfig for consistent formatting across editors
- Add VSCode configuration (extensions, settings, launch configs)
- Recommend ElixirLS, Docker, Markdown extensions
- Configure code formatting, spell checking, and workspace settings

GitHub Automation:
- Add Dependabot for automated dependency updates
- Configure separate update schedules for dev/prod dependencies
- Add PR auto-labeler based on changed files
- Add automatic greetings for first-time contributors
- Organize updates by package ecosystem (mix, docker, github-actions)

Git Hooks & Quality:
- Add pre-commit hook (format, credo, tests)
- Add commit-msg hook (validates commit message format)
- Add setup-hooks.sh script for easy installation
- Enforce code quality before commits
- Configurable with --no-verify flag

Performance Benchmarking:
- Add comprehensive benchmark suite (benchmark/run.exs)
- Benchmark list, search, filter, find, and tag operations
- Test with 100, 1K, and 10K post datasets
- Measure execution time and memory usage
- Include performance recommendations

Tool Version Management:
- Add .tool-versions for asdf version manager
- Pin Elixir 1.16.0 and Erlang 26.2.1
- Add .tool-versions.example with setup instructions
- Enable consistent versions across team

Comprehensive Documentation:
- Add FAQ.md (50+ questions covering all aspects)
- Add TROUBLESHOOTING.md (detailed diagnostic guide)
- Add ADVANCED.md (library usage, extensions, integrations)
- Add RELEASE_CHECKLIST.md (complete release process)
- Add FUNDING.yml template for sponsorship options

FAQ Coverage:
- General questions (what, who, installation)
- Usage questions (all commands, workflows)
- Technical questions (format, security, scaling)
- Development questions (contributing, testing)
- Troubleshooting (common issues, solutions)
- Advanced topics (customization, automation)

Troubleshooting Guide:
- Quick diagnostics commands
- Installation issue fixes
- Runtime problem solutions
- Docker troubleshooting
- Platform-specific fixes
- Performance optimization
- Preventive measures

Advanced Usage Guide:
- Using BlogEngine as library
- Custom storage backends (Markdown, PostgreSQL)
- Automation and scripting
- Performance optimization techniques
- Integration examples (RSS, static sites)
- Extending BlogEngine (plugins, custom commands)
- Advanced workflows

Release Checklist:
- Pre-release verification steps
- Version bumping process
- CHANGELOG management
- Code quality gates
- Security checks
- Release process automation
- Post-release procedures
- Hotfix process
- Rollback procedures

Developer Experience Improvements:
- Automated quality checks via hooks
- Consistent code style across team
- IDE-specific optimizations
- Performance visibility
- Clear upgrade paths
- Comprehensive help documentation

Total Files Added: 16
Total Lines Added: ~4000+

This completes the professional development infrastructure
with automation, documentation, and tooling for maintainers
and contributors.