Package to bootstrap the installation fo the Discord Linux application

Simply install Discord-installer. It will automatically download and build a package for Discord, as well as update it whenever it's necessary.

This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/duskmourn/discord/

Any way we could get an update to build packages for Fedora 33? Doesn’t seem to be working, at it looks like the previous spec references a spec for libcxx that’s no longer around.