generate-build-version.js

const fs = require('fs')
const packageJson = require('./package.json')

const appVersion = packageJson.version

const jsonData = {
  version: appVersion
}

const jsonContent = JSON.stringify(jsonData)

fs.writeFile('./public/version.json', jsonContent, 'utf8', (err) => {
  if (err) {
    console.log('An error occured while writing JSON Object to version.json')
    return console.log(err)
  }

  return console.log(
    `version.json file has been saved with version ${appVersion}`
  )
})