Update app.js

@@ -86,6 +86,7 @@ async function handleEvent(event) {
   .then((stream) => {
     stream.on('data', (chunk) => {
       console.log(chunk);
+
       var cheerio = require('cheerio');
       
       var uriBase = 'https://koreacentral.api.cognitive.microsoft.com/vision/v2.1/ocr';
@@ -105,7 +106,8 @@ async function handleEvent(event) {
       
       request.post(options, function (error, response, body) {
           console.log(options);
-        var data=atob(body);  
+          var data=  Buffer.from(body, 'base64').toString();
+          
         var text='';
         console.log(data);
         while(data.indexOf('text\\')!=-1)