quick production test script

cluster-server.js

@@ -0,0 +1,22 @@
+import cluster from 'cluster';
+import { cpus } from 'os';
+import { handler } from './build/handler.js';
+import express from 'express';
+
+const numCPUs = cpus().length;
+
+if (cluster.isPrimary) {
+    console.log(`Primary ${process.pid} spawning ${numCPUs} workers…`);
+    for (let i = 0; i < numCPUs; i++) cluster.fork();
+    cluster.on('exit', (w) => {
+        console.warn(`Worker ${w.process.pid} died — restarting…`);
+        cluster.fork();
+    });
+} else {
+    const app = express();
+    app.use(handler);
+    const port = process.env.PORT || 3000;
+    app.listen(port, () =>
+        console.log(`Worker ${process.pid} listening on ${port}`)
+    );
+}