@endel has just updated his BabylonJS + Colyseus Multiplayer Boilerplate repository to support the latest BabylonJS, Colyseus, Node.js, TypeScript, Webpack and related dependencies.
It's a great starting point for anyone interested in developing multiplayer games or multiuser applications with BabylonJS.
Here's more information:
BabylonJS + Colyseus Multiplayer Boilerplate
Colyseus website
Colyseus documentation
Support Endel via his Patreon campaign