Add Discord badge to README

README.md

@@ -2,6 +2,8 @@
   <img src="https://s3.amazonaws.com/ohmyzsh/oh-my-zsh-logo.png" alt="Oh My Zsh">
 </p>
 
+[![Discord server](https://img.shields.io/discord/642496866407284746)](https://discord.gg/bpXWhnN)
+
 Oh My Zsh is an open source, community-driven framework for managing your [zsh](https://www.zsh.org/) configuration.
 
 Sounds boring. Let's try again.