First, add your Firebase config to the index.js file using the guidance in the wiki for this repo.
Then, use the following steps in the VS Code terminal to clone the example app, install dependencies, generate client-side code, and execute the app:
git clone https://github.com/sublimezeal/bi-goog-firebase-example.git
cd bi-goog-firebase-example
npm install
.\node_modules\.bin\webpack
serve dist
Then, navigate a browser to http://localhost:3000.