Update app.py

app.py

@@ -183,6 +183,17 @@ async def on_thread_update(before, after):
                 slack_thread_ts = thread_mapping[discord_thread_id]
                 react_to_slack_message(slack_thread_ts, 'white_check_mark')
 
+
+def react_to_slack_message(thread_ts, emoji):
+    try:
+        response = slack_client.reactions_add(
+            channel=SLACK_CHANNEL_ID,
+            name=emoji,
+            timestamp=thread_ts
+        )
+    except SlackApiError as e:
+        print(f"Error reacting to Slack message: {e.response['error']}")
+
 #----------------------------------------------------------------------------------------------
 
 def send_daily_pings():