Setup NestJS

Install CLI:

npm install-g @nestjs/cli

Create project:

nest new my-app

Start server:

npm run start:dev

Default port:

<http://localhost:3000>

Dependencies

1. Database Layer

@nestjs/typeorm typeorm pg
Package Purpose
@nestjs/typeorm NestJS integration layer
typeorm ORM (like JPA)
pg PostgreSQL driver

2. Configuration Management