Pythonを追加するDockerfile
pyenvは部品を使うだけで最終的には削除します(Pythonは/usr/localに導入) FROM ubuntu:bionic ARG DEBIAN_FRONTEND=noninteractive ARG PYTHON_VERSION=3.9.0 ARG PYTHON_ROOT=/usr/local ARG PYENV_ROOT=/tmp/.pyenv ARG PYBUILD_ROOT=/tmp/python-build RUN apt update && apt install -y \ build-essential \ libssl-dev \ zlib1g-dev \ libbz2-dev \ libreadline-dev \ libsqlite3-dev \ wget \ curl \ llvm \ libncurses5-dev \ libncursesw5-dev \ xz-utils \ tk-dev \ libffi-dev \ liblzma-dev \ python-openssl \ git \ && git clone https://github.com/pyenv/pyenv.git $PYENV_ROOT \ && PREFIX=$PYBUILD_ROOT $PYENV_ROOT/plugins/python-build/install.sh \ && $PYBUILD_ROOT/bin/python-build -v $PYTHON_VERSION $PYTHON_ROOT \ && rm -rf $PYBUILD_ROOT $PYENV_ROOT