How to start a react project?

Question

React

I downloaded a react project from Github, but there is not a single html file in it, and I cannot run it in a text editor to see this project.
the project is on github:
https://github.com/volovodenko/TZ3
so my first question is:
Does a react site work only if files (js extension) are uploaded to the server (local || remote) in the same way as php files?
And the second question:
Next, I decided to try uploading the project to a local server and this is what it displays:

If I go to some folder and click on the JS file, it displays this: That is, the

project does not start at all, before uploading sites to the server using html + css +js and everything was ok, because there was an index.html file in the parent folder. Is it somehow different in React?
How to solve the problem?