title: KonvaJS scale down image without losing quality
body: <p>I am building a Cordova app with image manipulation using Konva (react-konva to be precise). The idea is that when I take a picture with a camera - I can add some markers to it using this library. But as I don't have much space - I need a relatively small stage (e.g. 300x500) to edit large images (e.g. 2000x3000). After manipulations are complete - I have to save that stage to a file. </p>
  
  <p>Currently as I save stage into a file - the image gets shrunk to fit the scale and that small image is the saved result which makes the image unusable.</p>
  
  <p>How can I scale the images down to fit the stage canvas without losing the image quality? </p>