Clone the rep on to your desktop. (Try not to use by downloading. Sometimes there could be inconsistencies due while un-zipping)
Navigate into the root folder and install dependencies by typing, npm install
Once ready, use
npm run build ( for running the dev server, in watch mode)
npm run test:watch (for running the test, in the watch mode)
npm start ( for running the dev server and tests in parallel, on the same console window, in watch mode)