To contribute to this project you'll need node install, if you don't have it you can get NodeJs here. If you're on MacOS, I recommend using Homebrew to install NPM/Node.
Then you can install the project dependencies by running:
npm install
You'll only ned to install the dependencies once.
To work on the project run:
gulp
This will start a browsersync for instant browser refresh, and will listen to any change on the HTML or the SCSS.
Images are from Unsplash