npm install remark-prism --save-dev
next.config.mjs
import remarkPrism from 'remark-prism';
// ...
remarkPlugins: [remarkPrism],
// ...
_document.js
to include theme CSS file// ...
<link rel="stylesheet" href="https://unpkg.com/dracula-prism@2.0.0/dist/css/dracula-prism.css"></link>
// ...