Rename of Jude to Zeke

Since Jude is a now a server, we rename it to Zeke, for Ezekiel
Update of tailscale to auto-register nodes
Update kubernetes to install the etcd application
Update Zeke IP address and DNS bindings

modules/nixos/kubernetes.nix

@@ -27,6 +27,7 @@ in
     };
 
     environment.systemPackages = [
+      pkgs.etcd
       pkgs.fluxcd
       pkgs.kubectl-cnpg
       pkgs.kubernetes-helm

modules/nixos/tailscale.nix

@@ -9,13 +9,19 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    services.tailscale.enable = true;
-    networking.firewall.checkReversePath = "loose";
+    age.secrets.tailscale-key.file = ../../secrets/tailscale.age;
     boot.kernel.sysctl = {
       "net.ipv4.ip_forward" = "1";
       "net.ipv6.conf.all.forwarding" = "1";
     };
     environment.systemPackages = [ config.services.tailscale.package ];
+    networking.firewall.checkReversePath = "loose";
+    services.tailscale = {
+      enable = true;
+      authKeyFile = config.age.secrets.tailscale-key.path;
+      authKeyParameters.preauthorized = true;
+      useRoutingFeatures = "both";
+    };
     systemd.services.tailscaled.partOf = [ "network-online.target" ];
   };
 }