Make sure you have installed Ammonite, npm and yarn.
amm scripts/site.sc --npmInstall true --yarnRunBuild true --publishLocal true
If you're getting an error message like
Cannot resolve $file import: almond/scripts/website/Website.sc make sure you have checked out the git submodule for the website script:
git submodule init
git submodule update
If the generation is successful, you can run a small webserver to serve the website locally, like
$ npx http-server docs/website/build
This command should print the address to access the local website, like
To watch sources and rebuild/hot-reload on changes in
$ amm scripts/site.sc --yarnRunBuild true --watch true
This should open a browser window, pointing at the locally running website.