Mention other compatible self-host-demos

Author: benitav

demos/CommandLine/README.md

@@ -1,7 +1,7 @@
 # PowerSync CLI demo app
 
 This demo features a CLI-based table view that stays *live* using a *watch query*, ensuring the data updates in real time as changes occur.
-To run this demo, you need to have the [Node.js self-host demo](https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs) running, as it provides the PowerSync server that this CLI's PowerSync SDK connects to.
+To run this demo, you need to have one of our Node.js self-host demos ([Postgres]((https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs)) | [MongoDB](https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs-mongodb) | [MySQL](https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs-mysql)) running, as it provides the PowerSync server that this CLI's PowerSync SDK connects to.
 
 Changes made to the backend's source DB or to the self-hosted web UI will be synced to this CLI client (and vice versa).