Welcome to NestJS: Building Scalable Backend Applications

# Welcome to NestJS NestJS is a progressive Node.js framework for building efficient and scalable server-side applications. It uses modern JavaScript, is built with TypeScript, and combines elements of OOP (Object Oriented Programming), FP (Functional Programming), and FRP (Functional Reactive Programming). ## Why Choose NestJS? ### 1. TypeScript First NestJS is built with TypeScript from the ground up, providing excellent type safety and developer experience. ### 2. Modular Architecture The framework promotes a modular architecture that makes your applications easy to maintain and scale. ### 3. Decorator-based Uses decorators extensively for clean, declarative code that's easy to read and understand. ### 4. Dependency Injection Built-in dependency injection container makes testing and code organization much easier. ## Getting Started To create a new NestJS project: ```bash npm i -g @nestjs/cli nest new project-name ``` ## Key Concepts - **Modules**: Organize your application into feature modules - **Controllers**: Handle incoming requests and return responses - **Services**: Business logic and data access - **Guards**: Authentication and authorization - **Interceptors**: Transform requests/responses - **Pipes**: Validation and transformation This framework is perfect for building enterprise-grade applications with clean architecture and excellent maintainability.