[fix] a bug

app.py

@@ -1,11 +1,14 @@
 from aioflask import Flask
+from aioflask import request
+from aioflask import jsonify
+
 from ci import app as bot
 
 app = Flask(__name__)
 
 
 @app.route("/", methods=['GET', 'POST'])
-async def webhook(request):
+async def webhook():
     data = request.json
     # json contains an attribute that differentiates between the types, see
     # https://docs.gitlab.com/ce/user/project/integrations/webhooks.html