First, install the dependencies.
$ npm install
Then, launch the app.
$ npm start
Now you should see a new browser window/tab opening in http://127.0.0.1:8080.
Usenpm run build
to build the static files on Linux or Mac.
Usenpm run build-windows
to build the static files on windows.
Usenpm run clean
to delete all the files generated by above commands.