Use single quotes :P

modules/utils/data.js

@@ -1,9 +1,9 @@
-const redis = require("redis");
+const redis = require('redis');
 
 redis.debug_mode = process.env.DEBUG_REDIS != null;
 
 const client = redis.createClient(
-  process.env.DATA_URL || process.env.OPENREDIS_URL || "redis://localhost:6379"
+  process.env.DATA_URL || process.env.OPENREDIS_URL || 'redis://localhost:6379'
 );
 
 module.exports = client;