fix(javascript/ditsmod-bun): fixed cluster mode for ditsmod-bun. (#7993)

Author: KostyaTretyak

javascript/ditsmod-bun/cluster.ts

@@ -1,8 +1,18 @@
-import { Application } from '@ditsmod/core';
+import cluster from 'node:cluster';
 import type { ServerOptions } from 'node:http';
+import { availableParallelism } from 'node:os';
+import { Application } from '@ditsmod/core';
 
 import { AppModule } from './app/app.module.js';
 
-const serverOptions: ServerOptions = { keepAlive: true, keepAliveTimeout: 0 };
-const app = await new Application().bootstrap(AppModule, { serverOptions });
-app.server.listen(3000, '0.0.0.0');
+const numCpus = availableParallelism();
+
+if (numCpus > 1 && cluster.isPrimary) {
+  for (let i = 0; i < numCpus; i++) {
+    cluster.fork();
+  }
+} else {
+  const serverOptions: ServerOptions = { keepAlive: true, keepAliveTimeout: 0 };
+  const app = await new Application().bootstrap(AppModule, { serverOptions });
+  app.server.listen(3000, '0.0.0.0');
+}