API Documentation Generator Setup

Set up API documentation generation for:

Framework: [Express/FastAPI/Django/Spring/etc.]
Documentation Format: [OpenAPI/Swagger/AsyncAPI]
Hosting: [SWAGGER UI/REDOC/CUSTOM]

Current State:
- Existing documentation: [YES/NO]
- Endpoint count: [NUMBER]
- Authentication types: [LIST]

Requirements:
- Interactive testing: [YES/NO]
- Code examples: [LANGUAGES NEEDED]
- Version support: [MULTIPLE VERSIONS]

Please provide:
1. Documentation library setup
2. Annotation/decorator examples
3. Schema documentation best practices
4. Authentication documentation
5. CI/CD integration for doc updates
6. Customization and theming