Support IPv4 HTTP public gateway entries

backend/internal/nginxconfig/nginxconfig.go

@@ -68,8 +68,8 @@ func RenderWithOptions(opts RenderOptions, routes gin.RoutesInfo, authPort int)
 	if scheme == "" {
 		scheme = "https"
 	}
-	if !tlsservice.ValidDomain(domain) {
-		return "", "", fmt.Errorf("请输入有效的单个完整域名")
+	if !tlsservice.ValidPublicHost(scheme, domain) {
+		return "", "", fmt.Errorf("请输入有效域名；HTTP 也支持 IPv4 地址")
 	}
 	if !tlsservice.ValidScheme(scheme) {
 		return "", "", fmt.Errorf("协议仅支持 http 或 https")