This short fluid-music composition demonstrates how to watch a score file, and live-update playback on the fluid music server.
For live update, first npm install, and then npm run watch. If the cybr server is running, playback should begin. When you make a change to session-content.js and save the file, you should hear the updated version playing.
The live reload functionality is still is a little unstable. I wouldn't recommend using live reload in a 'production' project yet.
If you just want to open the file in Reaper without playback or reloading the server, you can simply run node save-rpp.js (make sure to npm install first).