python:3.8.5-slim-buster- multi-stage - non-root - virtualenv

.dockerfile

FROM python:3.8.5-slim-buster as base

LABEL maintainer="Your Name <Your@Name.com>" \
      version="1.0.0"
      
RUN apt-get update && apt-get install tzdata -y --no-install-recommends
ENV TZ="America/Los_Angeles"

ENV PIP_NO_CACHE_DIR=1
ENV PIP_DISABLE_PIP_VERSION_CHECK=1
ENV PYTHONDONTWRITEBYTECODE=1

FROM base as builder

RUN adduser worker
USER worker
WORKDIR /home/worker

COPY --chown=worker:worker requirements.txt /home/worker/requirements.txt
ENV PATH="/home/worker/.local/bin:$PATH"
ENV PATH="/home/worker/venv/bin:$PATH"

RUN python3 -m pip install --upgrade pip && \
    python3 -m pip install --upgrade setuptools && \ 
    python3 -m pip install virtualenv

RUN python3 -m venv /home/worker/venv
RUN pip install -r requirements.txt

FROM base
RUN adduser worker
USER worker
WORKDIR /home/worker
COPY --from=builder /home/worker /home/worker
COPY --from=builder /home/worker/venv /home/worker/venv
COPY --chown=worker:worker . .

ENV PATH="/home/worker/venv/bin:$PATH"
ENTRYPOINT ["python"]
CMD ["src/main.py"]