For creating thumb you can follow the below github repository.
This project was bootstrapped with Create React App.
Rename sample-config.js to firebase.config.js and populate all the fields with firebase credentials.
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
The page will reload if you make edits.
You will also see any lint errors in the console.