In order to run this app you will need Angular CLI.
First of all clone it, change directory to summ-app and run npm i.
Now you can run ng serve and open http://localhost:4200/ in your browser.
Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the -prod flag for a production build.
Run ng test to execute the unit tests via Karma.
Run ng e2e to execute the end-to-end tests via Protractor.
Before running the tests make sure you are serving the app via ng serve.