FROM debian:bookworm

RUN set -x \
    && apt-get update -q \
    && apt-get upgrade -y -q \
    && apt-get install -y -q linux-headers-amd64 dkms fakeroot debhelper dh-dkms \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN useradd --home-dir /srv --system --uid 1000 --user-group builder
USER builder
WORKDIR /srv/build