I don't get why this is called simple. it's way overblown for a simple repo hosting tool. I serve static Debian packages on my github pages. it's just a matter to create the meta data and upload it to your static space. no need for another http/htps service.
aptly e.g. is much simpler providing the tools to create the meta files for an apt repo, but it can be made much simpler than that. just haven't found it yet.