Update index.md

related: ruby#2558

Author: BrianPurgert

en/community/index.md

@@ -23,6 +23,10 @@ to start:
   languages. If you have questions about Ruby, asking them on a mailing
   list is a great way to get answers.
 
+[Ruby Discord Server](https://discord.gg/UyQnKrT)
+: The Ruby Language Discord Server is a place where you can: chat with other other Rubyist, get help with Ruby questions or help others.
+ Discord is a good entrypoint for younger developers and it's easy to join.
+
 [Ruby on IRC (#ruby)](irc://irc.freenode.net/ruby)
 : The Ruby Language IRC Channel is a wonderful way to chat with fellow
   Rubyists.