basic-multi-layer-docker-build

Dockerfile

FROM python:3.10-slim as sources
RUN apt-get -y update --fix-missing

ENV DEBIAN_FRONTEND=noninteractive

ARG SSH_KEY_PRIV

RUN apt-get update -qq && apt-get install -y git openssh-server

# Authorize SSH Host
RUN mkdir -p /root/.ssh && \
    chmod 0700 /root/.ssh && \
    ssh-keyscan github.com > /root/.ssh/known_hosts

# Add the keys and set permissions
RUN echo "${SSH_KEY_PRIV}" > /root/.ssh/id_rsa && \
    chmod 600 /root/.ssh/id_rsa

RUN eval `ssh-agent -s` && ssh-add $HOME/.ssh/id_rsa


# do activities requiring the private key
pip install requirements.txt

FROM python:3.10-slim as production
RUN apt-get -y update --fix-missing
COPY --from=sources /opt/app /opt/app
COPY --from=sources /opt/app/venv /opt/app/venv