phase-1: optimize code

bin/server.js

@@ -0,0 +1,14 @@
+import 'dotenv/config';
+import { buildApp } from '../src/server/app.js';
+
+const PORT = process.env.PORT ?? 3000;
+const HOST = process.env.HOST ?? '0.0.0.0';
+
+const app = await buildApp();
+
+try {
+  await app.listen({ port: Number(PORT), host: HOST });
+} catch (err) {
+  app.log.error(err);
+  process.exit(1);
+}