CI docker image needs `libnatpmp` if we want to add natpmp support to our node.
!1837 adds NATPMP support to our binary, as a backport from Core via ABC. However, CI is still failing. We will need the CI image updated to install libnatpmp
as part of the initial debian packages it installs in docker, otherwise CI will continue to fail.
Edited by Calin Culianu