All I did was unzip the zip file. As you can see with my screenshot, there isn’t anything there that I could use as web code. There has to be something else that is needed.
What else are you looking for? The client side JS is in the public folder. This example has the server side code configured. If you set this up and deploy it to your hosted server then you’ll be able to process payments. Also if you just follow the README.md you can test locally. 
Bryan,
You aren’t helping me enough. I already told you that I don’t see any code in the zip folder I extracted. That should alert you to the fact that I need additional assistance. If you can’t provide that for me, then please transfer this post to another tech.
There’s nothing in the public.examples.card-payment.html or the server.js when you open it with your editor?