Dockerfile_snippets

Apt cache & non-interactive config:

ARG DEBIAN_FRONTEND=noninteractive

SHELL ["/bin/bash", "-o", "pipefail", "-c"]

# hadolint ignore=DL3008,DL3014
RUN --mount=type=cache,target=/var/cache/apt \
    --mount=type=cache,target=/var/lib/apt/lists \
    # Use german apt mirror
    sed -i -- 's/deb.debian.org/mirror.netcologne.de/g' /etc/apt/sources.list.d/* \
    # Keep apt cache
    && rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' | tee /etc/apt/apt.conf.d/keep-cache \
    # Answer yes to all non-security-related apt questions
    && echo 'APT::Get::Assume-Yes "true";' | tee /etc/apt/apt.conf.d/90assumeyes \
    # Update and upgrade
    && apt-get update \
    && apt-get upgrade \
    && apt-get install --no-install-recommends \
    apt-utils \
    && apt-get install --no-install-recommends \
    [packages]


Debian locale config:
ENV LANG=C.UTF8