Make sure you got node isntalled in version 10.12.x or higher. You can test this with:
node -v
v10.12.0
To init the project after cloning it, cd
into the projects template folder
cd public/assets/templates/web
and install (dev) dependencies via npm
npm install
Normaly when starting your Frontend work, you want to start livereload and automatically watch for file changes:
npm start
To start the watch process use (this watches for file changes and build the changed files)
npm run watch
To just build the CSS use
npm run build:css
To just build the JS (for development) use
npm run build:js
To just build the SVG sprite use
npm run build:svg
To build CSS, JS and SVG for production usage use
npm run release