title: How can I add shadow to the widget in flutter?
body: <p>How can I add shadow to the widget like in the picture below? </p>
  
  <p><a href="https://stackoverflow.com/questions/52173205/how-can-put-image-inside-the-image-in-flutter/52178364#52178364">This</a> is my current widget code.</p>
  
  <p><img src="https://i.stack.imgur.com/gxt9q.png" width="300" alt="Image with shadow"></p>