NestJS

NestJS provides a modular architecture with dependency injection, decorators for routing and validation, guards for auth, and interceptors for cross-cutting concerns.

Installation

# Create new NestJS project
npm i -g @nestjs/cli
nest new my-api
cd my-api
npm i @nestjs/typeorm typeorm pg class-validator class-transformer

Project Structure

# Standard NestJS project layout
src/