Update NestJS examples to not use beforeExit (#4932)

Co-authored-by: Joël Galeran <Jolg42@users.noreply.github.com>

Author: jharrell

typescript/graphql-nestjs/src/main.ts

@@ -3,6 +3,7 @@ import { AppModule } from './app.module'
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule)
+  app.enableShutdownHooks()
   await app.listen(3000, () => {
     console.log(`
 🚀 Server ready at: http://localhost:3000/graphql

typescript/graphql-nestjs/src/prisma.service.ts

@@ -4,12 +4,7 @@ import { PrismaClient } from '@prisma/client'
 @Injectable()
 export class PrismaService extends PrismaClient implements OnModuleInit {
   async onModuleInit() {
+    // Note: this is optional
     await this.$connect()
   }
-
-  async enableShutdownHooks(app: INestApplication) {
-    this.$on('beforeExit', async () => {
-      await app.close()
-    })
-  }
 }

typescript/rest-nestjs/src/main.ts

@@ -3,6 +3,7 @@ import { AppModule } from './app.module'
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule)
+  app.enableShutdownHooks()
   await app.listen(3000)
 }
 bootstrap()

typescript/rest-nestjs/src/prisma.service.ts

@@ -4,12 +4,7 @@ import { PrismaClient } from '@prisma/client'
 @Injectable()
 export class PrismaService extends PrismaClient implements OnModuleInit {
   async onModuleInit() {
+    // Note: this is optional
     await this.$connect()
   }
-
-  async enableShutdownHooks(app: INestApplication) {
-    this.$on('beforeExit', async () => {
-      await app.close()
-    })
-  }
 }