Dockerfile

FROM ubuntu:UBUNTU_TAG

# use bash shell as default
SHELL ["/bin/bash", "-c"]

# install python, pip and pipenv
RUN apt-get update && \
    apt-get install -y sudo curl git gcc make openssl libssl-dev libbz2-dev libreadline-dev libsqlite3-dev zlib1g-dev libffi-dev

# add the user Motoko, tribute to https://en.wikipedia.org/wiki/Motoko_Kusanagi
RUN useradd --create-home --shell /bin/bash --no-log-init --system -u 999  motoko && \
	echo "motoko	ALL = (ALL) NOPASSWD: ALL" >> /etc/sudoers
USER motoko
WORKDIR /home/motoko

# set some local environment variables
ENV LANG en_US.UTF-8

# install pyenv for motoko
RUN curl https://pyenv.run | bash

# update path to use pyenv
ENV PATH ~/.pyenv/bin:~/.local/bin:$PATH

# set the bashrc (for interactive sessions) and bash_profile (for login sessions)
RUN echo "eval \"\$(pyenv init -)\"" > ~/.bashrc && \
    echo "eval \"\$(pyenv virtualenv-init -)\"" >> ~/.bashrc && \
	echo "eval \"\$(pyenv init -)\"" > ~/.bash_profile && \
    echo "eval \"\$(pyenv virtualenv-init -)\"" >> ~/.bash_profile
	
# use login bash shell as default from now on, so that the bash_profile is sourced before any RUN command
SHELL ["/bin/bash", "-lc"]

# install python, upgrade pip, and install pipenv
RUN pyenv update && \
	pyenv install PYTHON_VERSION && \
	pyenv global PYTHON_VERSION && \
	pip --no-cache-dir install --user --upgrade pip && \
	pip --no-cache-dir install --user --upgrade pipenv