FROMalpineRUNapkadd--no-cache\autoconf\automake\bash\gcc\make\musl-dev\py3-pexpect\py3-pytest-xdist\tar\xvfb\xvfb-run\xz
# test-cmd-list.txt is just a cache buster hereADDtest-cmd-list.txt\docker/alpine/install-packages.sh\/tmp/
RUN/tmp/install-packages.sh\&&rm-r/tmp/*