Error: Invalid value for '--port': '$PORT' is not a valid integer.
Usage: uvicorn [OPTIONS] APP
Try 'uvicorn --help' for help.
Error: Invalid value for '--port': '$PORT' is not a valid integer.
Usage: uvicorn [OPTIONS] APP
Try 'uvicorn --help' for help.
Error: Invalid value for '--port': '$PORT' is not a valid integer.

FROM python:3.13

# system dependencies

WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY app ./app

CMD ["sh", "-c", "uvicorn app.main:app --host 0.0.0.0 --port $PORT"]