Chore: Use net.JoinHostPort (#28421)

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/api/http_server.go

@@ -107,7 +107,7 @@ func (hs *HTTPServer) Run(ctx context.Context) error {
 	hs.applyRoutes()
 
 	hs.httpSrv = &http.Server{
-		Addr:    fmt.Sprintf("%s:%s", setting.HttpAddr, setting.HttpPort),
+		Addr:    net.JoinHostPort(setting.HttpAddr, setting.HttpPort),
 		Handler: hs.macaron,
 	}
 	switch setting.Protocol {