CMS systems for site data

[dzienisz]

Create a simple CMS with auth to manage site data

[dzienisz]

create a CMS for website that would allow adding new functionalities like managing promos, blog entries etc.

[Omikorin]

I like GitCMS idea, although it is a paid option.
We can leverage existing GitHub infrastructure and not complicate things by an additional backend. Markdown is the best CMS and since we use a public GitHub project, I don't see a reason for a self-made CMS.