If you are after the quickest, but not the most reliable solution, you can proceed without downloading anything, and just hotlink to either GitHub Pages or jsDelivr resource. Keep in mind that contrary to using the files you downloaded and have complete control over, like in two other methods, no guarantees are given that the files published online will stay in place, stay the same, or stay published at all.
index.html
<!DOCTYPE html>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script type="module">
import { body, c } from 'https://cdn.jsdelivr.net/gh/frameorc/frameorc/src/dom.js';
body(
c.H1`Test`,
c.P`Hello, world!`);
</script>