This site uses Hugo, a modern framework for building websites. Hugo can be installed and run on most any system, following these instructions. This site is built and hosted at Netlify.com
The contents of this site's themes/thenewdynamic-hugo-core-theme/src folder are used to generate CSS and javascript. You may never have to touch anything here, unless you want to more deeply customize your styles. Note that this is a submodule, and to change it you will have to fork the theme and add it, unless you have push access to the original, or, more likely, duplicate the src folder into your root directory.
We use Yarn for package managment (instead of NPM) because it's fast and generates a lock file to make dependency management more consistent. The theme's .gitignore file should be kept intact to make sure that all files in the node_modules folder are not pushed to the repository.
We use Webpack to manage our asset pipeline. Arguably, Webpack is overkill for this use-case, but we're using it here because once it's set up (which we've done for you), it's really easy to use. If you want to use an external script, just add it via Yarn, and reference it in main.js. You'll find instructions in the js/main.js file.
PostCSS is just CSS. You'll find postcss.config.js in the css folder. There you'll find that we're using postcss-import which allows us import css files directly from the node_modules folder, postcss-cssnext which gives us the power to use upcoming CSS features today. If you miss Sass you can find PostCss modules for those capabilities, too.
This theme uses the Tachyons CSS Library. It's about 15kb gzipped, highly modular, and each class is atomic so you never have to worry about overwriting your styles. It's a great library for themes because you can make most all the style changes you need right in your layouts.
You'll find the commands to run in src/package.json.
For development, you'll need Node and Yarn installed:
$ cd themes/gohugo-theme-ananke/src/
$ yarn install
$ npm start
This will process both the postcss and scripts.
For production, instead of npm start, run npm run build:production, which will output minified versions of your files.