Fix overlay images in docs

website/docs/docs-overlay.mdx

 
 The example below demonstrates how to create a simple alert dialog using an Overlay. Touch events outside the alert will be blocked and won't pass through to the content behind the alert since we're specifying `interceptTouchOutside: true` in the static options of the Alert.
 
-[screenshot](/img/alert_android.png)
+<img width="30%" src={useBaseUrl('/img/alert_android.png')} />
 
 ```jsx
 const React = require('react');
 
 The example below demonstrates how to show a Toast using an Overlay. A user can interact with the content behind the toast since we've declared `interceptTouchOutside: false` in the static options of the Alert.
 
-[screenshot](/img/toast_android.png)
+<img width="30%" src={useBaseUrl('/img/toast_android.png')} />
 
 ```jsx
 const React = require('react');