I’m writing a Python app to connect to a Postgres container using the psycopg2 library

def connect():
    load_dotenv()
    host = os.getenv('POSTGRESQL_HOST')
    port = os.getenv('POSTGRESQL_PORT')
    user = os.getenv('POSTGRESQL_USER')
    password = os.getenv('POSTGRESQL_PASSWORD')
    database = os.getenv('POSTGRESQL_DATABASE')

    pool = psycopg2.pool.SimpleConnectionPool(
        2, 255, user=user, password=password,
        host=host, port=port, database=database)

    return pool

Then I write Dockerfile and build it successfully.
Dockerfile:

ARG PYTHON_VERSION=3.12
FROM  python:3.12-alpine as base

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app
COPY . /app/

RUN apk add --no-cache postgresql-libs && 
    apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev && 
    python -m pip install --no-cache-dir wheel && 
    python -m pip install --no-cache-dir -r requirements.txt && 
    apk --purge del .build-deps

EXPOSE 443

CMD ["python","/app/telegramBot.py"]

But I meet this error when I run image.
enter image description here

Can someone tell me how to fix?