You need to have Node version on your machine that matches the requirements of the docusaurus packages ("engines" field in package.json) that is used for building the documentation. Once you have it run the command below in your terminal to install project dependencies and build the project:
$ npm i
Once it is done start the project by running the command bellow:
$ npm run serve
That is it, enjoy the course by navigating to the http://localhost:3000 in your preferred browser.