Clone to /opt/timer.
Put openfest-timer.service in /etc/systemd/system.
Configure the actual rooms in config.js.
Requires NodeJS and npm.
systemctl daemon-reload
npm install
systemctl enable --now openfest-timer.serviceDefcon is a stopwatch running on Node.js, Express.js, and Socket.io. It is intended to be a good starting point if you're just learning to use web sockets. It currently uses xhr-polling so it is compatible with Heroku.
I originally wrote Defcon over four blog posts introducing Socket.io and deploying to Heroku. Please checkout the posts on my site, robdodson.me