needed to install some virtual display software.
`gcc` may be required to add to `./headless.sh`
Co-authored-by: Michael Pilosov <consistentbayes@gmail.com>
Reviewed-on: https://git.mlden.com/mm/mud-games/pulls/1
Co-authored-by: mm <mm@clfx.cc>
Co-committed-by: mm <mm@clfx.cc>
