simplify prometheus setup using cm3

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

go.mod

@@ -3,6 +3,6 @@ module github.com/chrissxMedia/redirector
 go 1.16
 
 require (
-	github.com/chrissxMedia/cm3.go v0.0.0-20230327023026-5b09b3e68183
+	github.com/chrissxMedia/cm3.go v0.1.0
 	github.com/prometheus/client_golang v1.14.0
 )

go.sum

@@ -48,6 +48,8 @@ github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cb
 github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/chrissxMedia/cm3.go v0.0.0-20230327023026-5b09b3e68183 h1:DRQfmnf1lS/K5wn+wrbTtSLJhyt6B9Pmcs4dQRD/1Ys=
 github.com/chrissxMedia/cm3.go v0.0.0-20230327023026-5b09b3e68183/go.mod h1:f7SWla9HMSV27sT1HLXvwp52PvQTZOeNpWhJiI22Apk=
+github.com/chrissxMedia/cm3.go v0.1.0 h1:5lJswWWmy5EL6ErK4IoA62elnVfj+DmEXwmb/3hsXgo=
+github.com/chrissxMedia/cm3.go v0.1.0/go.mod h1:Ic5ruwg6hNm+tOgUO7eJwrDXT1HJcV7FsIWnfuEt5SE=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=

redirector.go

@@ -9,7 +9,6 @@ import (
 
 	"github.com/chrissxMedia/cm3.go"
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
 //go:embed response.min.html
@@ -26,9 +25,7 @@ func main() {
 		Help: "Number of HTTP requests that contain the Host header.",
 	}, []string{})
 
-	prometheus.MustRegister(totalReqs)
-	prometheus.MustRegister(hostReqs)
-	http.Handle("/metrics", promhttp.Handler())
+	cm3.HandleMetrics(totalReqs, hostReqs)
 
 	cm3.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		totalReqs.WithLabelValues().Inc()