Publish it how? It's mostly markdown, you should be able to use something like Pandoc to convert it to anything else.
Edit : even simpler, you could just put them on dropbox in a shared folder. It's markdown so it's human readable as pure text apart from the images (and you said you don't care about graphs)
I liked the idea that other users can edit it or that the markdown is rendered within the browser. CodiMD and Hedgedoc support that. They even support Co-Editing notes which is over the top for my needs. I just like the idea that i can rightclick a note in my notebook and publish it. They lack privacy and protection features though like password input or generating a new URL or proper user accounts. It would be nice if i could just send a special link and for the duration of X or until i revoke it friends can look at the rendered markdown with their browser. See https://demo.hedgedoc.org/features?both
Also Data Control is something i desire so i prefer self hosted.
Edit : even simpler, you could just put them on dropbox in a shared folder. It's markdown so it's human readable as pure text apart from the images (and you said you don't care about graphs)