feat: scaffold NestJS API application

apps/api/src/main.ts

@@ -0,0 +1,12 @@
+import 'reflect-metadata';
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  const port = process.env['API_PORT'] ?? 3001;
+  await app.listen(port);
+  console.log(`TOWER API running on port ${port}`);
+}
+
+bootstrap();