Dockerfile

FROM ubuntu:focal

ARG DEBIAN_FRONTEND=noninteractive

RUN apt-get update && apt-get -y install \
    python3-pip \
    software-properties-common

RUN add-apt-repository ppa:deadsnakes/ppa
RUN apt-get update && apt-get -y install \
    clang-format \
    python2.7 \
    python3.6 \
    python3.7 \
    python3.8

# get user id from build arg, so we can have read/write access to directories
# mounted inside the container. only the UID is necessary, UNAME just for
# cosmetics
ARG UID=1010
ARG UNAME=builder

RUN useradd --uid $UID --create-home --user-group ${UNAME} && \
    echo "${UNAME}:${UNAME}" | chpasswd && adduser ${UNAME} sudo

USER ${UNAME}

# Install Conda
# Copied from continuumio/miniconda3
ENV LANG=C.UTF-8 LC_ALL=C.UTF-8

ENV PATH /home/${UNAME}/.local/bin:$PATH

# Install these in the base conda env
RUN pip3 install --user \
    tox==3.15.0