You need Node.js 22.12 or later. ImageMagick is used when Norna generates image variants.
Create a site:
npx @janga/norna@latest init my-site
cd my-site
npm install
npm run dev
The new project contains the Norna site files, npm scripts and setup needed to build the site.
For a real project, keep the generated lockfile committed so local and automated builds use the same Norna version.