I've been using TiddlyWiki https://tiddlywiki.com/ https://tiddlywiki.com/ in the node.js-based server mode. But I use it more as a journal than a logbook, and

I've been using TiddlyWiki https://tiddlywiki.com/ https://tiddlywiki.com/ in the node.js-based server mode. But I use it more as a journal than a logbook, and not really for structured data. What I like about it is that I can combine the journal/log aspect with a general knowledge database and seamlessly interlink the two. Theoretically, TiddlyWiki is ridiculously customizable, so any kind of automation would be possible. Unfortunately, it has fallen victim pretty badly to the "inner platform effect" - instead of letting people simply use the Javascript that it's built on, customizing is supposed to happen in a template language that is just plain horrible and makes even the most simple things like concatenating strings comically hard when done in a context where that kind of operation wasn't planned for.