feat: Initialize NestJS backend project with Prisma, core modules, configuration, and common utilities.

src/app.controller.ts

@@ -0,0 +1,23 @@
+import { Controller, Get } from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
+import { AppService } from './app.service';
+
+@ApiTags('Health')
+@Controller()
+export class AppController {
+  constructor(private readonly appService: AppService) {}
+
+  @Get()
+  @ApiOperation({ summary: 'Get API welcome message' })
+  @ApiResponse({ status: 200, description: 'API is running' })
+  getHello(): string {
+    return this.appService.getHello();
+  }
+
+  @Get('health')
+  @ApiOperation({ summary: 'Health check endpoint' })
+  @ApiResponse({ status: 200, description: 'Service is healthy' })
+  getHealth() {
+    return this.appService.getHealth();
+  }
+}