feat: scaffold NestJS API application

apps/api/src/modules/health/health.controller.ts

@@ -0,0 +1,13 @@
+import { Controller, Get } from '@nestjs/common';
+
+@Controller('health')
+export class HealthController {
+  @Get()
+  check() {
+    return {
+      status: 'ok',
+      service: 'tower-api',
+      timestamp: new Date().toISOString(),
+    };
+  }
+}

apps/api/src/modules/health/health.module.ts

@@ -0,0 +1,7 @@
+import { Module } from '@nestjs/common';
+import { HealthController } from './health.controller';
+
+@Module({
+  controllers: [HealthController],
+})
+export class HealthModule {}