Before reading this through make sure you have read the project’s ReadMe.
You can log into the site by visiting the a the root of the server's address and entering the proper credentials.
As the certificate was generated manually, you have to confirm in your browser that your site can be trusted.
This client does not need specific configuring.
However the html files in this directory have to be included in the server's code. Make sure that the quotation mark and the backslash characters are escaped and add quotation marks at the start + end of the lines before copying to the ESP's source code.
The resources for this page have to be served from an external server (see the server's ReadMe)