Windows Docker Python Path

I was successfully able to run my container (Django Python) on an older version of the docker engine. I did not change any code, yet now I see this error.

$ docker run --net container_net --ip 172.18.0.2 sift_pro
python: can't open file './manage.py runserver 0.0.0.0:8001': [Errno 2] No such file or directory

Here is what my dockerfile looks like:

FROM python:3.8


ENV PYTHONUNBUFFERED 1

RUN pip install
...
...
...

COPY . .

CMD  ["python", "./manage.py runserver 0.0.0.0:8001"]

I have also tried other variations of this code with no success.

FROM python:3.8

WORKDIR c:windowssift

ENV PYTHONUNBUFFERED 1


COPY . .

CMD  ["python", "C:windowssiftmanage.py runserver 0.0.0.0:8001"]

Does anyone see what I am doing wrong?

Source: StackOverflow