feat: do not send notification when notify token is empty

src/main.rs

@@ -170,6 +170,10 @@ fn keep_runningd(keep_running_config: Arc<KeepRunningConfig>) {
 }
 
 async fn send_notify(notify_token: &str, text: &str) {
+    if notify_token.is_empty() {
+        info!("Notify token is empty, do not send DingTalk notification");
+        return;
+    }
     match DingTalk::from_token(&notify_token) {
         Err(err) => error!("Prepare DingTalk error: {}", err),
         Ok(dt) => if let Err(err) = dt.send_text(text).await {