base-nestjs/src/main.ts

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
import { ValidationPipe } from '@nestjs/common';
import { ErrorsInterceptor } from './interceptor/errors.interceptor';
import mainConfig from 'config.json';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.useGlobalPipes(new ValidationPipe());
  app.useGlobalInterceptors(new ErrorsInterceptor());
  app.setGlobalPrefix('api');
  app.enableCors({
    origin: mainConfig.cors,
    credentials: true,
    exposedHeaders: ['set-cookie'],
  });

  // SWAGGER
  const config = new DocumentBuilder()
    .setTitle(process.env.npm_package_name)
    .setDescription('Base nest js')
    .setVersion(process.env.npm_package_version)
    .build();
  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('api', app, document);

  await app.listen(mainConfig.port);
}
bootstrap();