Add weekly-rebuild timer

system/default.nix

@@ -1,8 +1,10 @@
-{ ... }: {
+{ ... }:
+{
   imports = [
     ./sops.nix
     ./root-user.nix
     ./sshd.nix
     ./monitoring.nix
+    ./weekly-rebuild.nix
   ];
 }

system/weekly-rebuild.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+{
+  systemd.services."weekly-rebuild" = {
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.bash}/bin/bash -c 'nixos-rebuild --boot --flake git+https://git.t-juice.club/torjus/nixos-servers'";
+    };
+  };
+  systemd.timers."weekly-rebuild" = {
+    enable = true;
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnCalendar = "Sun 06:00:00";
+    };
+  };
+}