SDK-1680: Update iframe html to allow full screen

Author: echarrod

examples/doc_scan/templates/index.html

@@ -1,3 +1,3 @@
 {% include "layout/header.html" %}
-<iframe style="border:none;" width="100%" height="750" allow="camera" src="{{ iframe_url }}"></iframe>
-{% include "layout/footer.html" %}
+<iframe style="border:none;" width="100%" height="750" allow="camera" src="{{ iframe_url }}" allowfullscreen></iframe>
+{% include "layout/footer.html" %}