Update backend/app.py

backend/app.py

@@ -231,6 +231,12 @@ async def predict(model_name: str = Form(...), file: UploadFile = File(...)):
     else:
         return JSONResponse(content={"error": "Invalid model name"}, status_code=400)
 
+@app.on_event("startup")
+async def cleanup_on_startup():
+    for d in ["/tmp/huggingface", "/tmp/Ultralytics", "/tmp/matplotlib", "/tmp/torch", "/root/.cache"]:
+        shutil.rmtree(d, ignore_errors=True)
+    print("✅ Cleaned caches on startup")
+
 
 @app.get("/models")
 def get_models():