Remove tsflags=nodocs from /etc/dnf/dnf.conf
    
    tsflags=nodocs meas that nothing that's marked as %doc gets installed.
    This includes among other things files in /usr/share/help, which are
    needed for displaying built-in documentation for GNOME apps.
    
    This commit drops the tsflags=nodocs the we inherited from the container
    base image as built-in yelp documentation is often exposed through the
    UI in various flatpak apps and dropping the help files breaks it.