Dockerfile doesn't work

[igaloly]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Clone SPTAG.
cd SPTAGE.
Create a file called MyTest.py that imports SPTAG.
run docker build -t sptag . --progress=plain; docker run sptag

Using the Dockerfile. Include thos lines at the end:

RUN apt-get install -y python3

COPY MyTest.py ./Release

CMD ["python3", "./Release/MyTest.py"]

Expected behavior
For it to be able to import SPTAG.

Screenshots

Desktop (please complete the following information):
Windows. But it's a docker file at the end.