modify code to standard style

config/index.js

@@ -6,6 +6,6 @@ module.exports = {
     port: process.env.DB_PORT || 5432,
     db: process.env.DB_NAME || 'mystorage',
     user: process.env.DB_USER || 'postgres',
-    pass: process.env.DB_PASS || '',
+    pass: process.env.DB_PASS || ''
   }
-}
+}