🔐 adds .env configuration of listening port

src/main.ts

@@ -1,9 +1,10 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 import 'dotenv/config';
+import * as process from 'node:process';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
-  await app.listen(3030);
+  await app.listen(process.env.PORT || 3000);
 }
 bootstrap();