Update app.js

@@ -81,7 +81,7 @@ function handleEvent(event) {
     return Promise.resolve(null);
   }
   else if (event.type == 'message'&& event.message.type == 'image') {
-    return new Promise((resolve,reject)=>{
+    return new Promise(async(resolve,reject)=>{
       console.log("!");
       var cheerio = require('cheerio');
       
@@ -102,7 +102,7 @@ function handleEvent(event) {
         },
         body: event.message.image
       };
-      request.post(options, function (error, response, body) {
+      await request.post(options, function (error, response, body) {
         var data=JSON.stringify(body);  
         var text='';
         console.log(data);