feat(scaffold): add src/main.ts [skip ci]

src/main.ts

@@ -0,0 +1,9 @@
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  await app.listen(process.env.PORT ?? 3000);
+  console.log(`sonar-test-nest3 listening on :${process.env.PORT ?? 3000}`);
+}
+bootstrap();