using cluster module for multiple CPUs

server.ts

import cluster from "cluster";
import { cpus } from "os";

import app from "./app";

const numWorkers = cpus().length;

if (cluster.isPrimary) {
  for (let i = 0; i < numWorkers; i++) {
    cluster.fork();
  }
} else {
  app.listen(8443);
}