NestJS: The Modern Node.js Framework

NestJS is a powerful framework for building scalable Node.js server-side applications using TypeScript. It combines object-oriented, functional, and reactive programming approaches. NestJS features a three-tier architecture with controllers, services, and data access layers, promoting maintainability and testability. The framework offers modules, dependency injection, middleware support, and advanced features like data validation and database integration. NestJS also provides robust testing capabilities for unit, integration, and end-to-end testing, including support for CLI application testing.