My main advice to authors about prologues is "don't use them". It's rare when a story actually benefits from one, since they usually consist of an unnecessary scene with irrelevant backstory for a character, or in this case, an exposition dump about the setting. Chop the whole thing out and start us with chapter 1. Reveal the details of the world as the story progresses, whenever it becomes relevant.
I used a prologue in Last of the Ghost Lions because it was absolutely necessary given how i structured the story: the book is a trilogy of novellas closely woven together by the ever-looming threat of the robot drone project at the center of the plot. So I began with a prologue that introduces that threat and why it's a problem, and also throws the reader headlong into the action. Once the threat is established, I can do whatever I want, such as go two years into the past and introduce the reader to the world the story takes place in.
