Feuille is already kind of a `micro-container' on its own - it can be a static binary, doesn't need any third party libraries, chroots itself into the output folder and drops root privileges afterwards.
Though, it shouldn't be too complicated to make a Dockerfile for it.
Feel free to make one and share it, either to me directly or by making a pull request :)
Actually, I do not. The server it's hosted on runs other services that I, my family and some friends use, so as long as someone is using it, I'll probably keep funding it. That's not like it costs me hundreds of dollars a month, so I'm fine with that.