FROM jenkins/jenkins:lts
USER root

RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*

RUN curl -fsSL https://download.docker.com/linux/static/stable/x86_64/docker-27.5.1.tgz | tar xvz && \
    mv docker/docker /usr/bin/docker && \
    rm -rf docker

RUN groupadd -g 999 docker || true && \
    usermod -aG docker jenkins

USER jenkins