Add template host

hosts/template/scripts.nix

@@ -0,0 +1,32 @@
+{ pkgs, ... }:
+let
+  prepare-host-script = pkgs.writeShellScriptBin "prepare-host.sh"
+    ''
+      echo "Removing machine-id"
+      rm -f /etc/machine-id || true
+
+      echo "Removing SSH host keys"
+      rm -f /etc/ssh/ssh_host_* || true
+
+      echo "Removing temporary files"
+      rm -rf /tmp/* || true
+
+      echo "Removing logs"
+      rm -rf /var/log/* || true
+
+      echo "Removing cache"
+      rm -rf /var/cache/* || true
+
+      echo "Generate age key"
+      rm -rf /var/lib/sops-nix || true
+      mkdir -p /var/lib/sops-nix
+      ${pkgs.age}/bin/age-keygen -o /var/lib/sops-nix/key.txt
+
+      echo "Runing garbage collector"
+      ${pkgs.nix}/bin/nix-collect-garbage -d
+    '';
+in
+{
+  environment.systemPackages = [ prepare-host-script ];
+  users.motd = "Prepare host by running 'systemctl start prepare-host'.";
+}