The release is only 150 kb, in the unpacked form approximately the same
The logo, and icons for buttons can be found on the Internet, these are not pictures, these are UTF-8 characters, which are later part of the page title.
If you liked the cup
or the telephone ☎ - just copy it, and paste after the page name in the admin panel, and you will have sympathetic buttons 
here is the link https://github.com/turboblack/wondercms ... e/releases
