improve docker

Dockerfile

@@ -11,4 +11,4 @@ COPY --chown=user ./requirements.txt requirements.txt
 RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
 COPY --chown=user . /app
-CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["python", "-c", "import asyncio; asyncio.set_event_loop_policy(asyncio.DefaultEventLoopPolicy()); import uvicorn; uvicorn.run('app:app', host='0.0.0.0', port=7860)"]