ARG BUILD_IMAGE_SOURCE="python:3.8-slim"
FROM ${BUILD_IMAGE_SOURCE} as build_image

RUN apt-get -o Acquire::Max-FutureTime=86400 update
RUN apt-get install -y --no-install-recommends build-essential gcc
RUN pip install --upgrade pip
RUN python -m venv /opt/venv

ENV PATH="/opt/venv/bin:$PATH"