Update app.py

app.py

@@ -4,8 +4,9 @@ import socket
 import requests
 import sys
 import logging
-from fastapi import FastAPI, File, UploadFile, Form, CORSMiddleware
+from fastapi import FastAPI, File, UploadFile, Form
 from fastapi.responses import FileResponse, StreamingResponse
+from fastapi.middleware.cors import CORSMiddleware
 from PIL import Image
 import torch
 from diffusers import (