Webfront is an HTTP server and reverse proxy.
https://go.dev/talks/2012/simple.slide#29 https://github.com/nf/webfront
Prothemeus: https://pkg.go.dev/github.com/prometheus/client_golang/prometheus
Let's Encrypt
Run:
go run main.go -http :80 -rules ./rules.json -poll 10s -metrics :81