index.js

#!/usr/bin/env node
const { description, name, version } = require('./package.json')
  
const options = process.argv.slice(2)
const VERSION_MESSAGE = `${name} ${version}`
const HELP_MESSAGE = `${VERSION_MESSAGE}
${description}

Usage: 
--help    Help documentation
--version Installed package version`

if (options.includes('--version')) {
  console.log(VERSION_MESSAGE)
} else {
  console.log(HELP_MESSAGE)
}