Add chat button (#730)

* Add Join Chat Button

* Add Button Link in README

Currently broken

* Fix button link

.github/join-chat.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="148" height="20"><linearGradient id="b" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><mask id="a"><rect width="148" height="20" rx="3" fill="#fff"/></mask><g mask="url(#a)"><path fill="#555" d="M0 0h77v20H0z"/><path fill="#4c1" d="M77 0h71v20H77z"/><path fill="url(#b)" d="M0 0h148v20H0z"/></g><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11"><text x="38.5" y="15" fill="#010101" fill-opacity=".3">Rocket.Chat</text><text x="38.5" y="14">Rocket.Chat</text><text x="111.5" y="15" fill="#010101" fill-opacity=".3">JOIN CHAT</text><text x="111.5" y="14">JOIN CHAT</text></g></svg>

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.