Add chat button (#730)

* Add Join Chat Button

* Add Button Link in README

Currently broken

* Fix button link

README.md

@@ -1,6 +1,6 @@
 # Awesome-Selfhosted
 
-[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
+[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome) [![Chat](https://raw.githubusercontent.com/Kickball/awesome-selfhosted/master/.github/join-chat.svg)](https://chat.awesome-selfhosted.com)
 
 Selfhosting is the process of locally hosting and managing applications instead of renting from SaaS providers.