main.ts

import { NestFactory } from '@nestjs/core';
import { NestExpressApplication } from '@nestjs/platform-express';
import { join } from 'path';
import { AppModule } from './app.module';
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
import { ValidationPipe } from '@nestjs/common';

async function bootstrap() {
  const app = await NestFactory.create<NestExpressApplication>(AppModule);

  app.useStaticAssets(join(__dirname, '..', 'public'));
  app.setBaseViewsDir(join(__dirname, '..', 'views'));
  app.setViewEngine('ejs');

  app.useGlobalPipes(new ValidationPipe({}));

  const config = new DocumentBuilder()
    .setTitle('Chat')
    .setDescription('The chat API description')
    .setVersion('1.0')
    .addTag('chat')
    .build();
  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('api', app, document);

  await app.listen(process.env.CHAT_PORT);
}
bootstrap();