Install npm and nodejs from https://nodejs.org/en/download/ by downloading the installer for your OS and running it.
Once installed, open a terminal and run npm install in the project directory to install all the dependencies for the project.
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
Uses gh-pages npm package to deploy the app to github pages.
npm i -g gh-pages to install the package globally.