feat: scaffold center and guild backend NestJS skeletons

Fabric.Backend.Center/src/main.ts

@@ -0,0 +1,13 @@
+import 'reflect-metadata';
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  app.setGlobalPrefix('api');
+  const port = process.env.PORT ? Number(process.env.PORT) : 7001;
+  await app.listen(port);
+  console.log(`Fabric.Backend.Center listening on :${port}`);
+}
+
+void bootstrap();