BE/src/main.ts

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

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.useGlobalPipes(new ValidationPipe());

  const config = new DocumentBuilder()
    .setTitle('API')
    .setDescription('API description')
    .setVersion('1.0')
    .addServer("http://localhost:3000", "Development Server 1")
    .addServer("https://dev.alphaomegainfosys.com/test-api", "Development Server 2")
    .build();

  const options: SwaggerDocumentOptions = {
    autoTagControllers: false,
  };
  const documentFactory = () => SwaggerModule.createDocument(app, config, options);
  SwaggerModule.setup('api', app, documentFactory);

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