old_contents: /*jshint node:true*/
  'use strict';
  
  module.exports = function(/* environment, appConfig */) {
    return { };
  };
  
new_contents: /*jshint node:true*/
  'use strict';
  
  module.exports = function(/* environment, appConfig */) {
    return {rootURL: ''};
  };
  
subject: set rootURL in environment config