Microsandbox OCI image (https://docs.microsandbox.dev/recipes/guest/systemd-services)

Dockerfile

FROM debian:trixie

ARG MISE_VERSION=v2026.8.6

ENV DEBIAN_FRONTEND=noninteractive
ENV MISE_DATA_DIR=/mise
ENV MISE_CONFIG_DIR=/mise
ENV MISE_CACHE_DIR=/mise/cache
ENV MISE_INSTALL_PATH=/usr/local/bin/mise
ENV PATH=/mise/shims:${PATH}

RUN apt-get update \
  && apt-get install -y --no-install-recommends \
  bash-completion \
  build-essential \
  ca-certificates \
  curl \
  dbus \
  git \
  iproute2 \
  jq \
  kmod \
  less \
  openssh-client \
  procps \
  sudo \
  systemd \
  systemd-sysv \
  unzip \
  udev \
  xz-utils \
  && install -d -m 0755 /etc/sysctl.d \
  && printf '%s\n' \
  '# Microsandbox compact-kernel overrides' \
  'kernel.pid_max = 32768' \
  '-kernel.sysrq = 0x01b6' \
  > /etc/sysctl.d/90-microsandbox.conf \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*

RUN install -m 0755 -d /etc/apt/keyrings \
  && curl -fsSL https://download.docker.com/linux/debian/gpg \
  -o /etc/apt/keyrings/docker.asc \
  && chmod a+r /etc/apt/keyrings/docker.asc \
  && printf '%s\n' \
  'Types: deb' \
  'URIs: https://download.docker.com/linux/debian' \
  "Suites: $(. /etc/os-release && echo "$VERSION_CODENAME")" \
  'Components: stable' \
  "Architectures: $(dpkg --print-architecture)" \
  'Signed-By: /etc/apt/keyrings/docker.asc' \
  > /etc/apt/sources.list.d/docker.sources \
  && apt-get update \
  && apt-get install -y --no-install-recommends \
  containerd.io \
  docker-buildx-plugin \
  docker-ce \
  docker-ce-cli \
  docker-compose-plugin \
  && systemctl enable containerd.service docker.service \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*

RUN curl -fsSL https://mise.run | sh \
  && mise --version \
  && install -d -m 0755 /mise/cache

STOPSIGNAL SIGRTMIN+3

CMD ["/lib/systemd/systemd"]