This will create a Docker image with the minimum dependencies to build and run gem5. Issue-on: https://gem5.atlassian.net/browse/GEM5-236 Change-Id: Ia0ed1a84718dcd15895badf8618a661277f8349c Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/26583 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>