Set fixed height of demo

docs/index.md

@@ -6,7 +6,7 @@ of your choice.
 Comes with built-in Keyboard management and animation support. Supports Compose Desktop, Web (WASM), Android and iOS.
 
 <script src="jquery-3.7.1.min.js"></script>
-<div style="position: relative; max-width: 800px; border-radius: 20px; overflow: hidden;">
+<div style="position: relative; max-width: 800px; height:340px; border-radius: 20px; overflow: hidden;">
     <img src="menu-preview.jpg" id="menuImage" style="max-width: 100%; height: auto; display: block;">
     <iframe id="demoIframe" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; display: none;" src="preview/index.html" title="Demo" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin"></iframe>
 </div>