Imports github.com/gin-contrib/static github.com/gin-gonic/gin github.com/gorilla/websocket github.com/prometheus/client_golang/prometheus github.com/prometheus/client_golang/prometheus/promhttp github.com/sirupsen/logrus Standard library imports crypto/hmac crypto/sha256 crypto/tls encoding/base64 encoding/json flag fmt io/ioutil math/rand net/http os sample-room-golang/routers strings time