User-Online Tracker Service, written in Go programming language.
docker build -t uo .
docker run --rm --net=host uo -http-port 8080 -stats-addr 127.0.0.1:8125
/ping: ping health check/uo/trck.gif: tracking pixel to be included in your page/uo/sessions/count: reads out the count of recurring sessions/uo/newsessions/count: reads out the count of new sessions