how to run react event calendar

[JustaManpk]

I have downloaded and unzipped React event project.

But how can I run the project. Should the project be located in localhost?

The project contains no index.html file?

I can see in the demo that you click on an event link that opens a modal window.

I would like to change it to, when you click on an event link, then shows a DIV with a button with free time to ..Når

BUT, it is possible to change colors size calendar.
Or is it limited to use API