I assume you have Docker for Mac setup
docker-compose up
Watch the logs as you run these
curl -s http://localhost:3000/reports/products/1
curl -s http://localhost:3000/products/1
Once running running you can mess around with scaling services to see queue groups in action.
docker-compose scale us1=1 us2=2 us3=4 us4=1
If you want to see things in action more interactively (particularly worker queues)
brew install watch jq
watch -n 1 'curl -s http://localhost:3000/reports/products/1 | jq ".report|sort"'
Try scaling some of the service to 0 and back up 1 to see the effects