Enable auto-update on srv01-hf

hosts/srv01.hf/default.nix

@@ -13,6 +13,7 @@
       ../../modules/sshd.nix
       ../../modules/qemu-guest.nix
       ../../modules/docker.nix
+      ../../modules/auto-upgrade.nix
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
     ];

modules/auto-upgrade.nix

@@ -0,0 +1,15 @@
+{
+  inputs,
+  ...
+}: {
+  system.autoUpgrade = {
+    enable = true;
+    flags = [
+      "--recreate-lock-file" # Deprecated, but will hopefully be reintroduced
+      "-L"
+    ];
+    flake = inputs.self.outPath;
+    dates = "02:00";
+    randomizedDelaySec = "45min";
+  };
+}