PM2 start nuxt

command.sh

# now run in your console: (I'm actually using powershell)
pm2 start .\ecosystem.config.js

ecosystem.config.js

// here we have the ecosystem file 
// we may have different apps and environments.
// we can write here our environment variables or import them with "dotenv". Example:
// require('dotenv').config() // this will load your .env file ;)

// check the docks:
// https://pm2.io/doc/en/runtime/guide/ecosystem-file/
module.exports = {
  apps: [
    {
      name: 'at',
      script: './start.js',
      env: {
        HOST: 'localhost',
        PORT: 1234
      }
    }
  ],
}

start.js

// First, we need a js script to link in the ecosystem file,
// This is the script that will run our `npm start` command.

const exec = require('child_process').exec // Or es6 modules, you know, I'm not your supervisor.

console.log(
  `Starting app for production` // you may have different envs...
)

// Here's the good part
// by default the command line tool will be cmd! Check the docs:
// https://nodejs.org/api/child_process.html#child_process_child_process_exec_command_options_callback

const build = exec('npm.cmd start', { stdio: 'inherit', windowsHide: true })

build.stdout && build.stdout.on('data', console.log)
build.stderr && build.stderr.on('data', console.log)

build.on('close', (code) => {
  if (code !== 0) {
    console.log(`Build process exited with code ${code}`)
  }

  if (build.stdin) {
    build.stdin.end()
  }
})