Add redis client

server/redis.js

@@ -0,0 +1,8 @@
+const { promisify } = require('util');
+const redis = require('redis');
+
+const client = redis.createClient();
+
+exports.get = promisify(client.get).bind(client);
+exports.set = promisify(client.set).bind(client);
+exports.del = promisify(client.del).bind(client);