Add server demo link

README.md

@@ -16,12 +16,15 @@ Sleep Tracker is intended for anyone interested in improving their sleep and hea
 - Make recommendations not only based on sleep time, but also on bed time (some reasearch will need to be done in that area)
 - Connect to third party sleep tracking services
 
+> Server demo: https://sleep-tracker-rui.herokuapp.com/
+
 ## API Documentation
 ___
 > Values required in **`bold`**.
 
 > All requests need to provide with a JSON Web Token for authentication, except for **`/api/auth/register`** and **`/api/auth/login`**.
 
+
 ### USERS SCHEMA | **`users`**
 | field    | data type         | metadata                                            |
 | :--------| :---------------- | :-------------------------------------------------- |

index.js

@@ -3,7 +3,8 @@ const server = require("./api/server");
 
 server.get("/", (req, res) => {
 	res.json({
-		message: `API server for Sleep Tracker running. :)`
+		message: `API server for Sleep Tracker up and running. :)`,
+		documentation: `https://github.com/ruihildt/sleep-tracker-backend#api-documentation`
 	});
 });