add keep alive command

hosts/base.nix

@@ -75,7 +75,6 @@
     git
     pciutils
     sysstat
-    xivlauncher
   ];
 
   services.openssh.enable = true;

modules/k3s/deployments/ubuntu.nix

@@ -8,6 +8,7 @@
       {
         name = "ubuntu";
         image = "ubuntu:latest";
+        command = ["tail" "-f" "/dev/null"];
       }
     ];
   };