Use Redis addon

Author: OrkoHunter

server/index.js

@@ -12,7 +12,7 @@ var helmet = require('helmet');  // To change response headers
 // To temporarily store JSON data from GitHub and also
 // the number of connected users
 var redis = require("redis"),
-    redis_client = redis.createClient();
+    redis_client = redis.createClient(process.env.REDIS_URL);
 
 var path = require('path');