"/usr/bin/node bone101.js" is started by systemd via /lib/systemd/system/bone101.service
To have it start or not on boot use:
systemctl enable bone101.service
systemctl disable bone101.service
To check the current status:
systemctl status bone101.service
To manually stop and start the process:
systemctl stop bone101.service
systemctl start bone101.service
The html & javascript files served by node.js on port 80 are in /var/lib/cloud9/bone101
There is more info on the process itself at
http://nodejs.org/ and
https://c9.io/