Feature request: Specify hostname while creating distroboxes

[crispyfires]

Since, for whatever reason on GNOME 43, distroboxes need to share a hostname with the host, it is necessary to specify the command distrobox-create $DISTROBOXNAME -i $IMAGE --hostname "$(uname -n)" when creating a distrobox on the CLI to make exported application icons display properly. It would be really nice to have a parameter to specify the hostname of a distrobox while creating it in Distroshelf.