How to create Dockerfile in Project?

I will use you project 
I build dockerfile python but error

`FROM python:3.9

RUN sudo apt-get install libzbar0

RUN pip install thanakan

RUN make download-poetry
RUN make install
RUN make check-safety
RUN make check-style

COPY / .
CMD ["python", ".thanakan/__init__.py"]`

Can you help me?
