title: How to have rounded corners for stage or layers in React Konva
body: <p><a href="https://i.stack.imgur.com/f9Y0c.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/f9Y0c.png" alt="enter image description here"></a></p>
  
  <p>Hi ,</p>
  
  <p>I want my stage to look like below image and user will draw  on it , my question is how can I do this with React-Konva ? 
  I only saw cornerRadius property in rect. 
  And also users actions should be with in the stage. </p>
  
  <p>thanks in advance </p>