config/c3d2: add nameservers config

config/c3d2.nix

@@ -1,6 +1,6 @@
 # This module sets configuration for all NixOS machines defined in this flake
 
-{ zentralwerk, config, options, lib, pkgs, ... }:
+{ zentralwerk, hostRegistry, config, options, lib, pkgs, ... }:
 
 let
   hqPrefix64 = builtins.head (
@@ -138,6 +138,15 @@ in {
         };
       };
 
+    networking.nameservers = with hostRegistry.hosts.dnscache; [
+      ip4
+      ip6
+      "9.9.9.9"
+    ];
+    environment.etc."resolv.conf".text = lib.concatMapStrings (ns: ''
+      nameserver ${ns}
+    '') config.networking.nameservers;
+
     nix = {
       autoOptimiseStore = true;
       gc = {