To run this webapp you will need to open 2 node processes: one to serve frontend page, another to provide backend
cd backend
npm install
npm start
cd frontend
npm install
npm start
Should npm start raise error, just manually launch
node_modules/http-server/bin/http-server
Or just http-server if installed globally (npm install --global http-server)
Then open your favorite browser and head to localhost:8080
May change according to your system, check the console