added prometheus route

routes.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/elazarl/go-bindata-assetfs"
 	"github.com/gorilla/context"
+	"github.com/prometheus/client_golang/prometheus"
 )
 
 var prefix map[string]string
@@ -50,5 +51,7 @@ func addRoutes(sm *http.ServeMux, a *Allowances, staticFiles string) {
 		)
 	}
 
+	sm.Handle("/metrics", prometheus.Handler())
+
 	context.ClearHandler(sm)
 }