add containers conf

hosts/fw.cloonar.com/modules/podman.nix

@@ -5,6 +5,9 @@ let
 in {
   users.groups.podman.gid = cids.gids.podman;
   virtualisation = {
+    containers.containersConf.settings = {
+      containers.dns_servers = [ "10.42.97.10" ];
+    };
     podman = {
       enable = true;
       dockerCompat = true;