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FROM ubuntu:22.04
ARG USER=ctf
COPY --chown=root:10000 launcher /
COPY --chown=root:10000 flag /chroot/
RUN apt-get update && apt-get -y dist-upgrade gcc make ruby-dev strace
RUN gem install seccomp-tools

RUN groupadd -g 10000 $USER && useradd -N -u 10000 -g 10000 $USER && chmod 750 /launcher && chmod 440 /chroot/flag
# ENTRYPOINT ["/usr/bin/timeout", "-s9", "60", "/launcher"]

# strace /launcher exp.bin