Links:

• http://mycodesmells.com/post/watching-metrics-with-prometheus
• https://blog.alexellis.io/prometheus-monitoring/
• https://scot.coffee/2018/12/monitoring-go-applications-with-prometheus/

Paths on Ubuntu 18.04: /snap/prometheus/21/bin/prometheus --config.file=/var/snap/prometheus/21/prometheus.yml --storage.tsdb.path=/var/snap/prometheus/common