modules/system/containers: enable nat for container interfaces

modules/system/containers.nix

@@ -86,14 +86,12 @@ let
           services.openssh.hostKeys = [ ];
           system.stateVersion = lib.mkDefault config.system.stateVersion;
 
-          networking = lib.mkDefault {
-            useHostResolvConf = false;
-            nameservers = [
+          networking.useHostResolvConf = false;
+          networking.nameservers = [
             "1.1.1.1"
             "1.0.0.1"
           ];
         };
-        };
 
         bindMounts = {
           # Pass in host's system key to allow decrypting secrets inside containers