Dockerfile

# Still in LTS as of june '24. python2 support isn't a thing in 26.04(ubuntu:latest) either
ARG BASE_IMAGE=ubuntu:22.04
FROM ${BASE_IMAGE}


ENV DEBIAN_FRONTEND=noninteractive \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PATH="/opt/venv/bin:${PATH}"


RUN apt-get update && \
    apt-get install -y --no-install-recommends \
      python2 \
      python3 \
      python3-pip \
      python3-venv \
      r-base \
      ca-certificates \
      curl && \
    ln -s /usr/bin/python2 /usr/bin/python && \
    rm -rf /var/lib/apt/lists/*

RUN python3 -m venv /opt/venv

WORKDIR /app

COPY requirements.txt .

# always more secure to run as non-root
RUN useradd -m appuser && \
    chown -R appuser:appuser /opt/venv /app

USER appuser

RUN pip install --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt


CMD ["sleep", "infinity"]