It's a static site generator. Unlike many others, Publii is a graphical application, very easy to use. It manages content edition with 3 different methods:
Wysiwyg editor
Block editor (inspired by Medium IHMO)
Markdown editor
Adding images is simple, you can select one as featured for Organic data, put one in the header for the site or for each post.
It runs on Windows, Mac and Linux.
I'm going to nip over to hear the talk on #iroh, which is a new sibling implementation of some parts of the IPFS stack, but if you want to see how IPFS is doing in the browser, follow along with https://kyledenhartog.com here: https://bit.ly/ipfs-browser-talk
This is a theme I see in modern #IPFS usage -- #iroh is optimized for small private networks of a few known devices, rather than one big public network of unknown peers. You see the same setup in https://tryquiet.org/ a Discord-on-IPFS-on-Tor for private groups.