Adding Glitch button to React project

Hi, I want to add a glitch button to my React project I’ve uploaded to Glitch, the instructions just seem to assume you are making a simple HTML website. is there any React specific instructions? I’m new to React so no idea what to do. (ie: how to add the script that is needed for the glitch button to a React component?)

Thanks, these are the instructions I’ve seen:

There are a few ways to do it - in this example app it’s in the regular HTML that surrounds the React stuff. See!/starter-react