evaluate and reduce server's power usage

While we do not directly control our physical infrastructure, we still do use actual power, which has an environmental cost and, therefore, is part of the major existential threat facing humanity at the peak of its history. Reducing power usage is not only an economic incentive, it's an existential necessity.

The first step is to do monitoring, however. I found out about a project call scaphandre which provides Prometheus metrics and Grafana dashboards for actual power usage on physical servers. While that may not cover our machines "in the cloud", it may work on our physical hardware.