add udp port

nixos/ferret/adguard.nix

···
 let
     certloc = "/var/lib/acme/ferret.otter.place";
 in {
-  networking.firewall.allowedTCPPorts = [ 53 ];
+  networking.firewall = {
+    allowedTCPPorts = [ 53 ];
+    allowedUDPPorts = [ 53 ];
+  };
 
   services.adguardhome = {
     enable = true;
···
       dns = {
 
         bind_hosts = [
+          "127.0.0.1"
           "192.168.1.69"
         ];