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const cluster = require('cluster'),  numCPUs = require('os').cpus().length,  Aroma = require('aroma.js');if (cluster.isPrimary) {  console.log(`Primary ${process.pid} is running`);  for (let i = 0; i < numCPUs; i++) {    cluster.fork();  }  cluster.on('exit', (worker, code, signal) => {    console.log(`worker ${worker.process.pid} died`);  });} else {  const app = module.exports = new Aroma();  app.parseUrlEncoded();   app.use((req, res, next) => {    res.setHeader("Server", "Aroma.js");    return next();  });  app.get('/json', (req, res) => res.send({ message: 'Hello, World!' }));  app.get('/plaintext', (req, res) => {    res.setHeader('Content-Type', 'text/plain');    res.send('Hello, World!');  });    app.listen(8080);}
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