Thanks if you want to help the project, I really appreciate it.
Please, use Yarn, not NPM, the project uses yarn.lock, not package-lock.json.
Use yarn serve, this opens a dev serven on localhost:8080.
You will see a menu with the buttons "Dev 1", "Dev 2"... (routes with /#/dev/ prefix)
Click on one of the links to open the currently developed component, on each page the component is used in its own way.
No need to do a build (yarn build), I'll do it myself.
After the changes are made, use the commit script to commit the changes (yarn commit). This project uses commitizen and conventional changelog standard.