old_contents: /*eslint no-console:0 */
  'use strict';
  require('core-js/fn/object/assign');
  const webpack = require('webpack');
  const WebpackDevServer = require('webpack-dev-server');
  const config = require('./webpack.config');
  const open = require('open');
  
  new WebpackDevServer(webpack(config), config.devServer)
  .listen(config.port, 'localhost', (err) => {
    if (err) {
      console.log(err);
    }
    console.log('Listening at localhost:' + config.port);
    console.log('Opening your system browser...');
    open('http://localhost:' + config.port);
  });
  
new_contents: /*eslint no-console:0 */
  'use strict';
  require('core-js/fn/object/assign');
  const webpack = require('webpack');
  const WebpackDevServer = require('webpack-dev-server');
  const config = require('./webpack.config');
  const open = require('open');
  
  new WebpackDevServer(webpack(config), config.devServer)
  .listen(config.port, '0.0.0.0', (err) => {
    if (err) {
      console.log(err);
    }
    console.log('Listening at localhost:' + config.port);
    console.log('Opening your system browser...');
    open('http://localhost:' + config.port);
  });
  
subject: make app available from other devices as well