I would like to know how to integrate my own template to a website built with the flynax CMS?

This CMS has its own templates but I don't like any of them, so I want to integrate my own template that I made with Bootstrap. On the flynax website it mentions that you can integrate your own template but I couldn't find any documentation about it. If someone has already worked with this CMS or has integrated their own template, I would like to be able to obtain that information.