Imports github.com/prometheus/client_golang/prometheus github.com/prometheus/client_golang/prometheus/promhttp github.com/prometheus/client_golang/prometheus/push github.com/rs/zerolog github.com/spf13/viper gopkg.in/go-playground/validator.v9 gopkg.in/tylerb/graceful.v1 Standard library imports fmt io io/ioutil log math/rand net/http net/http/httputil net/url os os/signal strings syscall time