old_contents: require('babel-core/register'); // Using for babel transpiling
  
  const WebpackIsomorphicTools = require('webpack-isomorphic-tools');
  // This should be the same with webpack context
  const dirRoot = require('path').join(__dirname, '.');
  
  // Setup global variables for use
  global.__CLIENT__ = false;
  global.__SERVER__ = true;
  global.__DEV__ = process.env.NODE_ENV !== 'production';
  
  // Settings of webpack-isomorphic-tools
  // eslint-disable-next-line max-len
  global.webpackIsomorphicTools = new WebpackIsomorphicTools(require('./tools/webpackIsomorphicTools.config'))
    .development(__DEV__)
    .server(dirRoot, () => {
      require('./src/server');
    });
  
new_contents: require('babel-core/register'); // Enable runtime transpilation to use ES6/7 in node
  
  const WebpackIsomorphicTools = require('webpack-isomorphic-tools');
  // This should be the same with webpack context
  const dirRoot = require('path').join(__dirname, '.');
  
  // Setup global variables for use
  global.__CLIENT__ = false;
  global.__SERVER__ = true;
  global.__DEV__ = process.env.NODE_ENV !== 'production';
  
  // Settings of webpack-isomorphic-tools
  // eslint-disable-next-line max-len
  global.webpackIsomorphicTools = new WebpackIsomorphicTools(require('./tools/webpackIsomorphicTools.config'))
    .development(__DEV__)
    .server(dirRoot, () => {
      require('./src/server');
    });
  
subject: Update comment