TiddlyWiki on Ubuntu 24.04 by cloudimg

TiddlyWiki is the open source, self-contained personal wiki and non-linear notebook. Instead of rigid pages, everything you write is captured as a small, individually addressable note called a tiddler, and tiddlers link, tag and transclude each other freely so a knowledge base grows the way you think.

The cloudimg image runs TiddlyWiki on its own built-in Node.js server as a dedicated system user, storing each tiddler as a file under a server wiki folder on the VM, fronted by nginx on port 80 with an unauthenticated /healthz endpoint for load balancer probes. Every change you make is saved straight back to the server, and your whole wiki lives on the VM disk so it persists across reboots and is captured with the image.

No default login. Access is gated by TiddlyWiki's own HTTP Basic Authentication, requiring a unique admin password generated on the first boot of every VM for every read and every write - the wiki is never world-readable or world-writable. No credential is shared across VMs and none is known at image capture.

Licensing - BSD 3-Clause, FREE. No per-seat or per-request fee. The cloudimg charge (0.04 USD per vCPU/hour) covers packaging, security patching, image maintenance and 24/7 expert support.