First iteration of custom Highcharts export module

export-module-first-attempt.js

const exporter = require('highcharts-export-server');

exports.module = function(exportSettings){
  return new Promise((resolve, reject) => {
    exporter.initPool()
    exporter.export(exportSettings, function(err, res){

      if(err){
        console.log(err)
        return reject(err)
      }

      const data = res.data
      
      exporter.killPool()
      
      return resolve(data)
    })
  })
}