$ git clone https://github.com/ryojsb/prometheus-trial.git
# ls prometheus-trial/
docker-compose.yml prometheus.yml
# cd prometheus-trial
# docker-compose up -d
Starting prometheus ... done
Creating grafana ... done
http://localhost:9090
http://localhost:3000
When you register prometheus as deta source, you have to write not localhost but prometheus_container_ip in HTTP URL.