Imports github.com/gorilla/mux github.com/pkg/errors github.com/prometheus/client_golang/prometheus github.com/prometheus/client_golang/prometheus/promauto github.com/prometheus/client_golang/prometheus/promhttp github.com/spf13/cobra github.com/stianeikeland/go-rpio/v4 Standard library imports encoding/json errors fmt io/ioutil log net/http os os/signal runtime strconv strings syscall text/tabwriter time