nest-project/src/main.ts

import { HttpAdapterHost, NestFactory } from '@nestjs/core'
import { ValidationPipe } from '@nestjs/common'
import { ConfigService } from '@nestjs/config'
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger'
import { PrismaClientExceptionFilter, PrismaService } from 'nestjs-prisma'
import { AppModule } from './app.module'

async function bootstrap() {
  const app = await NestFactory.create(AppModule)

  // Validation
  app.useGlobalPipes(new ValidationPipe({ whitelist: true }))

  // enable shutdown hook
  const prismaService = app.get(PrismaService)
  await prismaService.enableShutdownHooks(app)

  // Prisma Client Exception Filter for unhandled exceptions
  const { httpAdapter } = app.get(HttpAdapterHost)
  app.useGlobalFilters(new PrismaClientExceptionFilter(httpAdapter))

  // Swagger Api
  const options = new DocumentBuilder()
    .addBearerAuth()
    .setTitle('Nest Project')
    .setDescription('The Nest-Project API description')
    .setVersion('1.0')
    .build()
  const document = SwaggerModule.createDocument(app, options)
  SwaggerModule.setup('api', app, document)

  const configService = app.get(ConfigService)
  const PORT = configService.get<number>('nest.port', 12400)

  await app.listen(PORT)
}
bootstrap()