Adding missing admin.initializeApp()

Author: nicolasgarnier

moderate-images/functions/index.js

@@ -16,6 +16,8 @@
 'use strict';
 
 const functions = require('firebase-functions');
+const admin = require('firebase-admin');
+admin.initializeApp();
 const mkdirp = require('mkdirp-promise');
 const vision = require('@google-cloud/vision')();
 const spawn = require('child-process-promise').spawn;