After you have added the code for app.js, add more javascript for your slideshow to work.
As you coded your slideshow HTML and CSS, there is one more step: add javascript for the slideshow to work.
Check out https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow
You will see the javascript to add to your page.
Make sure javascript is added to the page after </footer> but before </body>
https://github.com/hgrether/SunshineCafe/blob/bf10608257fbeed2ed818af5e15730f238cfc0c7/gallery.html#L144
4
After you have added the code for app.js, add more javascript for your slideshow to work. As you coded your slideshow HTML and CSS, there is one more step: add javascript for the slideshow to work. Check out https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow You will see the javascript to add to your page. Make sure javascript is added to the page after
</footer>but before</body>