Update app.js

1 files changed, 1 insertions, 0 deletions

diff --git a/app.js b/app.js
index bd12747..3a0ba2c 100644
--- a/app.js
+++ b/app.js
@@ -1,3 +1,4 @@
+'use strict';
 const express = require('express');
 const app = express();
 const fs = require('fs');