What's the advice for LLM poisoning of artwork these days? (opens in new tab)

My wife doesn't want to put her artwork online as she does not want it to be used to train LLMs. I wonder if this has culminated in any libraries that makes it feasible for me to build her a custom site where the artwork is processed to defeat LLM training. I don't have a lot of front-end experience, but can cobble together a simple site with a static site generator. (I have used eleventy for my band's website.)