refactor api modules

apps/api/src/domain/hello/HelloController.ts

@@ -0,0 +1,14 @@
+
+
+import { Controller, Get } from '@nestjs/common';
+import { HelloService } from './HelloService';
+
+@Controller()
+export class HelloController {
+  constructor(private readonly helloService: HelloService) {}
+
+  @Get()
+  getHello() {
+    return this.helloService.getHello();
+  }
+}