Add headers endpoint

src/app.controller.ts

@@ -1,4 +1,4 @@
-import { Controller, Get } from '@nestjs/common';
+import { Controller, Get, Req } from '@nestjs/common';
 import { AppService } from './app.service';
 
 @Controller()
@@ -9,4 +9,9 @@ export class AppController {
   getHello(): string {
     return this.appService.getHello();
   }
+
+  @Get('headers')
+  getHeaders(@Req() req: Request) {
+    return req.headers;
+  }
 }