Imports github.com/gorilla/websocket github.com/mdp/qrterminal github.com/prometheus/client_golang/prometheus github.com/prometheus/client_golang/prometheus/promauto github.com/prometheus/client_golang/prometheus/promhttp go.etcd.io/bbolt Standard library imports context errors fmt io log math/rand net net/http os os/signal path/filepath reflect runtime/debug strconv strings sync testing time