test: add huge image to enforce testing

Author: jehon

demo/index.html

@@ -29,6 +29,7 @@
         const images = [
             '/waiting/1.jpg',
             '/waiting/2.jpg',
+            'https://mumofthreedevils.files.wordpress.com/2014/05/godzilla.jpg'
         ];
         let current = 0;