This is a simple wrapper to be run as setuid root that invokes bash through
nsjail to limit the capabilities and
resource usage of users that connect to the challenge VMs. This wrapper should
be instlled inside the VMs and spawned instead of the normal login shell by the
backend server.
Run the ./build-deb.sh script from this directory to build
two .deb packages: nsjail-bash-i386.deb and nsjail-bash-arm64.deb, that
are then ready to be installed through apt/dpkg inside the VMs.