text: 
  const test = require('./config.testing')
  const dev = require('./config.dev')
  const prod = require('./config.prod')
  const base = require('./config.base')
  const {deepAssign} = require('../lib/helpers')
  
  const env = process.env.NODE_ENV
  const config = (env === 'test') ? test : ((env === 'production') ? prod : dev)
  
  module.exports = deepAssign({}, base, config)
  