[Python] How can I make Notion Webhooks with Python FastAPI?

I am making Webhook in Notion and I'm using Python FastAPI Library.

Here is my code, router.py:

router = APIRouter()
@router.post("/webhook")
async def handle_webhook(request: Request):
print(await request.json())
return {"status": "received"}


and main.py:

from fastapi import FastAPI, Request
from fastapi.templating import Jinja2Templates
from fastapi.staticfiles import StaticFiles

from router import router as web_router

app = FastAPI()
app.mount("/static", StaticFiles(directory="src/web/resources"), name="static")

app.include_router(web_router)

if __name__ == "__main__":
import uvicorn
uvicorn.run("main:app", host="0.0.0.0", port=8080, reload=True)


and I'm running this server with Azure Service, so if I send webhook post in curl, it works well. But if I upload this url to Notion Button Webhooks, I get 'Failed to run button.' If I use webhook.site, it works well too. What did I wrong?

Edit) If I test with my curl, there is FastAPI log on my server, but If I press button in notion, there is no log. That means notion didn't request at first.

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