text: module.exports = (function (env) {
      var config = {}
  
      switch(env) {
          case 'production'  :
              config = require('../env/prodution');
              break;
          case 'development' :
              config = require('../env/development');
              break;
          case 'testing'     :
              config = require('../env/testing');
              break;
          default:
              console.error('NODE_ENV evvironment variable not set')
              process.exit(1);
      }
  
      return config;
  
  })(process.env.NODE_ENV || 'development');