- Replace npm commands with equivalent Bun commands in GETTING_STARTED.md
- Update TESTING.md to reflect Bun-specific test and development scripts
- Simplify installation, development, and testing instructions
- Replaced Express with Elysia for improved performance and type safety
- Integrated Elysia middleware for rate limiting, security headers, and request validation
- Refactored security utilities to work with Elysia's context and request handling
- Updated token management and validation logic
- Added comprehensive security headers and input sanitization
- Simplified server initialization and error handling
- Updated documentation with new setup and configuration details
