code: function configureDevServer(config) {
    if (borela !== 'serve')
      return
    config.devServer = {
      contentBase: PROJECT_BUILD_DIR,
      headers: {
        'Access-Control-Allow-Headers': '*',
        'Access-Control-Allow-Methods': '*',
        'Access-Control-Allow-Origin': '*',
      },
      index: 'index.html',
      stats: config.stats,
      watchContentBase: true,
      port,
    }
  }
docs: We are only including configuration for the dev server when the “serve”
  command is executed.