nb changes, add wol script to fw

hosts/fw.cloonar.com/modules/wol.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+let
+  wolScript = stdenv.mkDerivation {
+    name = "wol-script";
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
+    outputHash = sha256;
+    builder = writeShellScript "wol-lease" ''
+      IP=$(cat /var/lib/kea/dhcp4.leases | grep $1 | awk -F, '{print $1}' | tail -n 1);
+      MAC=$(cat /var/lib/kea/dhcp4.leases | grep $1 | awk -F, '{print $2}' | tail -n 1);
+      ${pkgs.wol}/bin/wol -i $IP $MAC
+    '';
+  };
+in
+{
+  environment.systemPackages = [ 
+    wolScript
+  ];
+}