Used version 0.6.0 of ColyseusJS.
Colyseus is a game server framework for NodeJS.
http://gamestd.io/colyseus/
Construct 2 is an HTML5 game engine.
https://www.scirra.com/
Find the Construct JavaScript SDK Template on:
https://www.scirra.com/manual/15/sdk
The .c2addon file is simply a renamed .zip.
Drag and drop it in Construct to install.
To launch the test server (need NodeJS and NPM):
cd test/server
npm install
npm start
nb: if supervisor .bin files were not created, launch "npm install supervisor"