Dockerfile

FROM debian:buster

ENV LANG="C.UTF-8" LC_ALL="C.UTF-8"
ENV DEBIAN_FRONTEND noninteractive

RUN apt update
RUN apt -qy install --no-install-recommends python3 python3-pip
RUN pip3 install -U pip

COPY pip-requirements-docker.txt /tmp/pip-requirements-docker.txt
RUN pip install --no-cache-dir -r /tmp/pip-requirements-docker.txt tox