Which CMS to choose for closed technical publications?

Question

CMS

There was a need to create a site, access to which will have only two people. It is planned to publish various information on the site in the form of articles that I would like to easily find on this site (Perhaps there will be open publications in the future). The site will naturally be closed from the Internet (well, or at least most of the pages). Please do not recommend wiki engines ... So I could not realize them with my meager perception ...
UPD. Interested in a solution that can be put on the side of your server.

Answer 1

Google Docs

Answer 2

wordpress

Answer 3

Any that you can master in the study.