Simply clone the files to a desired location
Open terminal, navigate to the file, and do the following commands:
npm install -g firebase-tools (This installs firebase tools globally)
firebase login (You will be redirected to firebase where you login using your credentials)
firebase init
Now in the terminal prompt, choose the Hosting option, navigate using arrow keys and select using space.
Now you will be prompted to choose from an existing firebase project or create a new one
We will assume you already have an existing firebase project.
Now for the Hosting Setup
What do you want to use as your public directory?: www
Configure as a single-page app (rewrite all urls to /index.html)?: y
File www/index.html already exists. Overwrite?: n
Now you are ready to deploy the web app. simply do firebase deploy.
firebase deploy
You will be prompted with the Hosting URL where the web app is hosted, click on it and you will be able to use the app.