pm2.js

const path = require('path')
const pm2 = require('pm2')

const instances = process.env.WEB_CONCURRENCY || -1 // Set by Heroku or -1 to scale to max cpu core -1
const maxMemory = process.env.WEB_MEMORY || 512

pm2.connect(function () {
  pm2.start({
    script: path.resolve(__dirname, './build/node/main.js'),
    name: 'CadeMinhaSala',
    exec_mode: 'cluster', // https://github.com/Unitech/PM2/blob/master/ADVANCED_README.md#schema
    instances: instances,
    max_memory_restart: maxMemory + 'M', // Auto-restart if process takes more than XXmo
    env: {
      'NODE_ENV': 'production',
    },
  }, function (err) {
    if (err) return console.error('Error while launching applications', err.stack || err)
    console.log('PM2 and application has been succesfully started')

    // Display logs in standard output
    pm2.launchBus(function (err, bus) {
      console.log('[PM2] Log streaming started')

      bus.on('log:out', function (packet) {
        console.log('[App:%s] %s', packet.process.name, packet.data)
      })

      bus.on('log:err', function (packet) {
        console.error('[App:%s][Err] %s', packet.process.name, packet.data)
      })
    })
  })
})