- Add README with repository overview and usage instructions
- Add CONTRIBUTING with branch naming, commit, and PR guidelines
- Add MIT LICENCE
- Add .gitignore for Windows, macOS, Linux, IDE, and Claude Code files
- Add file header with usage instructions and Developer edition licence notice
- Document all environment variables with inline comments
- Reorganise MSSQL_PID edition list into Free / Development / Paid categories
- Add .env.example with documented defaults for SA password and edition