adding ipv6 support because i like ipv6

main.go

@@ -24,6 +24,7 @@ import (
 	"arimelody-web/log"
 	"arimelody-web/model"
 	"arimelody-web/view"
+	amnet "arimelody-web/net"
 
 	"github.com/jmoiron/sqlx"
 	_ "github.com/lib/pq"
@@ -518,7 +519,18 @@ func main() {
 
     // start the web server!
     mux := createServeMux(&app)
-    fmt.Printf("Now serving at http://%s:%d\n", app.Config.Host, app.Config.Port)
+    server := &amnet.DualStackHTTPServer{ Handler: mux }
+    if err := server.ListenAndServe(app.Config.Host, "::", int(app.Config.Port)); err != nil {
+        panic(err)
+    }
+    fmt.Printf(
+        "Now listening on port %d (http://%s:%d, http://[%s]:%d)\n",
+        app.Config.Port,
+        app.Config.Host,
+        app.Config.Port,
+        "::",
+        app.Config.Port,
+    )
     stdLog.Fatal(
         http.ListenAndServe(fmt.Sprintf("%s:%d", app.Config.Host, app.Config.Port), 
         CheckRequest(&app, HTTPLog(DefaultHeaders(mux))),