feat(notification): add Pushover

app/Notifications/Server/Unreachable.php

@@ -5,6 +5,7 @@ namespace App\Notifications\Server;
 use App\Models\Server;
 use App\Notifications\CustomEmailNotification;
 use App\Notifications\Dto\DiscordMessage;
+use App\Notifications\Dto\PushoverMessage;
 use App\Notifications\Dto\SlackMessage;
 use Illuminate\Notifications\Messages\MailMessage;
 
@@ -60,6 +61,15 @@ class Unreachable extends CustomEmailNotification
         ];
     }
 
+    public function toPushover(): PushoverMessage
+    {
+        return new PushoverMessage(
+            title: 'Server unreachable',
+            level: 'error',
+            message: "Your server '{$this->server->name}' is unreachable.<br/>All automations & integrations are turned off!<br/><br/><b>IMPORTANT:</b> We automatically try to revive your server and turn on all automations & integrations.",
+        );
+    }
+
     public function toSlack(): SlackMessage
     {
         $description = "Your server '{$this->server->name}' is unreachable.\n";