NestJS – Initialization

NestJS

Initialization

Setting up a new NestJS application.

Install CLI & Create Project: Install the NestJS CLI globally and scaffold a new application.

📄terminal
bash

# Install the Nest CLI globally
npm i -g @nestjs/cli

# Create a new Nest application
nest new my-nest-project

# Start the application in watch mode
cd my-nest-project
npm run start:dev

Bootstrap Application: The entry file of the application which uses the core function `NestFactory.create()`.

📄src/main.ts
typescript

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  // Enable CORS if needed
  app.enableCors();
  // Set global prefix
  app.setGlobalPrefix('api');
  
  await app.listen(3000);
  console.log(`Application is running on: ${await app.getUrl()}`);
}
bootstrap();