add sandstorm.io description

README.md

@@ -16,6 +16,11 @@ Get the app for your Android phone:
 
 Now compatible with all Android devices as old as version 4.0.x - [dowload here](https://github.com/RocketChat/Rocket.Chat/wiki/Build-the-Android-Cordova-Web-App-and-connect-to-your-own-Rocket.Chat-Server).
 
+Host your own Rocket.Chat server in four seconds flat:
+
+[![Rocket.Chat on Sandstorm.io](https://raw.githubusercontent.com/Sing-Li/bbug/master/images/sandstorm.png)](https://apps.sandstorm.io/app/vfnwptfn02ty21w715snyyczw0nqxkv3jvawcah10c6z7hj1hnu0)
+
+
 Try it on Ubuntu:
 
 [Deploy on VPS or standalone server](https://github.com/RocketChat/Rocket.Chat/wiki/Deploy-Rocket.Chat-without-docker)