How to create a knowledge center or wiki?

Question

Layouts and prototypes

Good afternoon.
The client wants a section on the wiki site with useful articles.
The usability of Wikipedia is depressing, and other projects are mostly copied and do not bring anything new.
Actually a question to other designers. Has anyone faced such a task, and if so, what inspired them.

Answer 1

In the comments to the question itself, I saw the answer:
Alexander Fudin :
Yaroslav Ivanov :
In my opinion, this is the easiest option - to fasten the wiki and put custom css on it
. I don’t know any alternatives, because I wasn’t interested. But this does not mean that they do not exist, perhaps just no one knows on the Toaster, ask on the stack.