謎のエラー curl: (56) Recv failure: Connection reset by peer

docker-compose.yml

version: "3"
services:
python:
container_name: backend_dev
build: ./backend
ports:
- "5000:5000"
volumes:
- ./backend:/var/www/backend
- ../backend/logs:/var/www/backend/logs
- ./backend/output_txt_files://backend/output_txt_files
- /home/sudouser/project/ALBT/backend/input_audio_files:/input_audio_files
- /var/run/docker.sock:/var/run/docker.sock

dockerfile

FROM python:3.11.0-slim
WORKDIR /var/www/backend
RUN apt update &&
apt -y upgrade &&
apt install -y gcc
COPY requirements.txt .
RUN pip install --upgrade pip &&
pip install -r requirements.txt
pip install requests
COPY . .
CMD ["python", "`app.py"]

実行したら、以下のエラーが出ました...