in lib/jenkinsfile_runner/commands/init.rb [95:108]
def install_docker_cli
return unless configuration.docker_agent?
<<~EOF
RUN apt update && \\
apt install -y software-properties-common && \\
curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add - && \\
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable" && \\
apt update && \\
apt install -y docker-ce-cli && \\
rm -rf /var/lib/apt/lists/*
EOF
end