You can export your book as HTML, in three different ways:
as a simple single file that contains the whole book
as a single file that can be navigated using a Table of Contents
as a static micro-site, where each section is a different page (this is how the very user guide you are reading has been published)
This way, you can actually host your book anywhere on the web, or convert it to other formats, from HTML.
Just like with EPUB exporting, it's that simple: You seamlessly went from editing your book to casually downloading it as an HTML file or microsite archive, with a few clicks, without ever leaving Novelitist.