Dear all,
I made a static site with Tiddlywiki and a tutorial explaining how I did it:
https://www.didaxy.com/exporting-static-sites-from-tiddlywiki There is no great innovation to what I've done but it packages knowledge from lots of different places into a set of instructions that I've now tested. The tutorial also explains how you can host your static site and how you can manage images, which may be of more general interest than the rest of the tutorial.
I've made my work available as a plugin and a github repo and I hope that, if you're interested in this sort of thing, you will be kind enough to give me your feedback about anything that you think I can improve.
This is still experimental so, although it carries no particular risk, please back your work up as always before using it, if you choose to.
Regards,
Richard