First, install dependencies. You'll need Node and NPM - instructions for installing those can be found at Treehouse Installation Guides. In your terminal, cd to the root folder and install node modules by running npm install. You'll also need to install NPX globally by running npm i -g npx.
Run npx -p @angular/cli ng serve for a dev server. In a browser, navigate to http://localhost:4200/.
Run ng test to execute the unit tests via Karma.