Owners of EL7-based systems with the amazonlinux-indexhtml package installed will receive errors when attempting to install the graphical desktop system RPM-groups:

file /usr/share/doc/HTML/index.html from install of centos-indexhtml-7-9.el7.centos.noarch conflicts with file from package amazonlinux-indexhtml-1-1.el7.noarch

Presumably, similar will happen on RHEL or other RHEL-derived systems.

Need to exclude the amazonlinux-indexhtml package from this repository's root-folder to allow fuller deployment-flexibility of hosts installing RPMs from this repository.