Quickstart:
$> git clone https://github.com/UCREL/hex-website.git
$> cd hex-website
$> git submodule update --init --recursive
$> npm install
$> npm run dev:11ty
This should run a dev server instance on port 8080 of your local machine that watches for changes and reloads automatically.
If you have CSS error (from a longstanding bug, sorry!) just restart the dev server and everything will update.