Apply suggestions from code review

Co-authored-by: Petar Kirov <[email protected]>

Author: AleksPopov4

modules/random-alerts/default.nix

@@ -17,8 +17,10 @@
         args = {
           urls = mkOption {
             type = types.listOf types.str;
-            example = "[http://localhost:9093]";
-            description = ''Alertmanager URLs'';
+            example = [ "http://localhost:9093" ];
+            description = ''
+              A list of Alertmanager endpoint URLs used for sending alert notifications.
+            '';
           };
 
           min-wait-time = mkOption {

packages/random-alerts/src/main.d

@@ -101,10 +101,10 @@ void executeAtRandomIntervals(Params params)
 
         if (currentTimeTOD >= startTime && currentTimeTOD <= endTime)
         {
-            for (int i = 0; i < urls.length; i++)
+            foreach (url; urls)
             {
-                infof("Posting alert on %s...", urls[i]);
-                postAlert(urls[i], alertDuration);
+                infof("Posting alert on %s...", url);
+                postAlert(url, alertDuration);
                 infof("Alert posted successfully.");
             }
         }