Just simple paste files how simple vue 3 setup on server side.
Notes:
<script type="importmap">
{
"imports": {
"vue": "https://unpkg.com/vue@3/dist/vue.esm-browser.js"
}
}
</script>
It took time to learn it on how to handle vue loading import on browser side.
https://stackblitz.com/edit/vue-ssr-example-wkbutf?file=server.js
https://vuejs.org/guide/scaling-up/ssr.html#rendering-an-app