feat(monitoring): Add admin emails

modules/dgn-notify/default.nix

@@ -2,17 +2,36 @@
   config,
   pkgs,
   lib,
+  meta,
+  nodeMeta,
   ...
 }:
+
+let
+  inherit (lib)
+    concatStringsSep
+    mkEnableOption
+    mkForce
+    mkIf
+    ;
+
+  emails = concatStringsSep ", " (
+    builtins.map (name: meta.organization.members.${name}.email) nodeMeta.admins
+  );
+
+  cfg = config.dgn-notify;
+in
+
 {
 
   options.dgn-notify = {
-    enable = lib.mkEnableOption "DGNum email notification cli" // {
+    enable = mkEnableOption "DGNum email notification cli" // {
       default = true;
     };
   };
-  config = lib.mkIf config.dgn-notify.enable {
-    services.mail.sendmailSetuidWrapper.group = lib.mkForce "mail";
+
+  config = mkIf cfg.enable {
+    services.mail.sendmailSetuidWrapper.group = mkForce "mail";
     users.groups.mail = { };
 
     programs.msmtp = {
@@ -29,12 +48,13 @@
         passwordeval = "cat ${config.age.secrets.mail.path}";
       };
     };
+
     services.systemd-notify = {
       enable = true;
       command = builtins.toString (
         pkgs.writeShellScript "sendmail" ''
           ${pkgs.msmtp}/bin/sendmail -i -t <<ERRMAIL
-          To: admins+monitoring@dgnum.eu
+          To: admins+monitoring@dgnum.eu, ${emails}
           Subject: [$HOSTNAME] Systemd failure: $1
           Content-Transfer-Encoding: 8bit
           Content-Type: text/plain; charset=UTF-8