import { NestFactory, Reflector } from '@nestjs/core'; import { AppModule } from './app.module'; import { ClassSerializerInterceptor, ValidationPipe } from '@nestjs/common'; async function bootstrap() { const app = await NestFactory.create(AppModule); app.useGlobalInterceptors(new ClassSerializerInterceptor(app.get(Reflector))); app.useGlobalPipes(new ValidationPipe()); await app.listen(4000); } bootstrap();