Reduce image size

TUTORIAL.md

@@ -522,7 +522,9 @@ Update `beer.html` to display the image retrieved:
 
 If everything works as expected, you should see a page similar to the one below in your browser.
 
-![Good Beers UI](./static/good-beers-ui.png)
+<p align="center">
+<img src="./static/good-beers-ui.png" width="300" alt="Good Beers UI">
+</p>
 
 ## PWAs with Ionic