ADD: redis setup and created a redis client

setup/redis.js

@@ -0,0 +1,18 @@
+const redis = require('redis')
+const env = process.env.NODE_ENV || 'development'
+
+let connectionString
+if (env === 'development') {
+    connectionString = process.env.REDIS_URL
+} else if (env === 'test') {
+    connectionString = process.env.TEST_REDIS_URL
+} else if (env === 'production') {
+    connectionString = process.env.REDIS_URL
+}
+const client = redis.createClient({ url: connectionString })
+
+client.on('error', function (err) {
+    console.log(err)
+})
+
+module.exports = client