packages/@vuepress/core/lib/client/index.ssr.html

<!DOCTYPE html>
<html lang="{{ lang }}">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>{{ title }}</title>
    <meta name="generator" content="VuePress {{ version }}">
    {{{ userHeadTags }}}
    {{{ pageMeta }}}
    {{{ canonicalLink }}}
    {{{ renderResourceHints() }}}
    {{{ renderStyles() }}}
  </head>
  <body>
    <!--vue-ssr-outlet-->
    {{{ renderScripts() }}}
  </body>
</html>