tryFullStack/backend/src/main.ts

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { ValidationPipe } from '@nestjs/common';
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  if (process.env.NODE_ENV !== 'production') app.enableCors();
  app.useGlobalPipes(
    new ValidationPipe({
      whitelist: true, // DTO 정의된 속성만 허용
      forbidNonWhitelisted: true, // DTO 없는 속성 들어오면 에러
      transform: true, // 자동 타입 변환
    }),
  );

  // SWAGGER
  const config = new DocumentBuilder()
    .setTitle('API DOC')
    .setDescription('API Document')
    .setVersion('0.1')
    .addBearerAuth()
    .build();
  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('api', app, document);

  await app.listen(process.env.PORT ?? 3000);
}
bootstrap();