add tailscale-router to domain

hosts/tailscale-router/host.nix

@@ -6,6 +6,11 @@
       name = "tailscale-router";
       sopsFile = ../../secrets/tailscale-router.yaml;
     })
+    (import ../../modules/ipa/client.nix {
+      keytabSopsFile = ../../secrets/tailscale-router.keytab;
+      caCertFile     = ../../certs/ipa-ca.crt;
+    })
+
   ];
 
   networking = {