fixed

main.py

@@ -4,6 +4,7 @@ os.environ['NUMBA_CACHE_DIR'] = '/tmp/'
 from fastapi import FastAPI, WebSocket, WebSocketDisconnect, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse, HTMLResponse
+from fastapi.staticfiles import StaticFiles
 import numpy as np
 import librosa
 import soundfile as sf