Flags for listen and metrics address; fix in newRedirectPasteSuccess.txt.tmpl

Fixes #9

metrics.go

@@ -13,11 +13,7 @@ import (
 	bolt "go.etcd.io/bbolt"
 )
 
-const (
-	METRICS_ADDR = "127.0.0.1:58614"
-)
-
-func StartMetricsServer() {
+func StartMetricsServer(addr string) {
 	var (
 		_ = promauto.NewGaugeFunc(prometheus.GaugeOpts{
 			Namespace: "rushlink",
@@ -45,7 +41,7 @@ func StartMetricsServer() {
 	router.Handle("/metrics", promhttp.Handler()).Methods("GET")
 	srv := &http.Server{
 		Handler:      router,
-		Addr:         METRICS_ADDR,
+		Addr:         addr,
 		WriteTimeout: 15 * time.Second,
 		ReadTimeout:  15 * time.Second,
 	}