vuepress/dockerbuild/dot_vuepress/enhanceApp.js

//  view these console messages on the browser console

// async function is also supported, too
export default ({

  Vue, // the version of Vue being used in the VuePress app
  options, // the options for the root Vue instance
  router, // the router instance for the app
  siteData, // site metadata
  isServer // is this enhancement applied in server-rendering or client
}) => {
  // ...apply enhancements to the app
  console.log({ Vue, options, router, siteData, isServer });
}