Only take Discussion creations

app.py

@@ -21,5 +21,9 @@ async def get_events():
 async def webhook(request: Request):
     global urls
     event = await request.json()
+    if event["action"] != "create":
+        return
+    if event["scope"] != "discussion":
+        return
     content = event["content"]
     urls += url_re.findall(content)