Changed ports of nestjs services to 3001 and 3002

Author: Vignesh-30

backend/question-service/src/main.ts

@@ -3,6 +3,6 @@ import { AppModule } from './app.module';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
-  await app.listen(3000);
+  await app.listen(3002);
 }
 bootstrap();

backend/user-service/src/main.ts

@@ -3,6 +3,6 @@ import { AppModule } from './app.module';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
-  await app.listen(3000);
+  await app.listen(3001);
 }
 bootstrap();