title: Re-size uploaded image and save it
body: <p>In some cases ,like you want to save image related to your content as cover image.</p>
  
  <p>Original image is so bigger and it is not good idea to show original one to user if user does not want it.If user wants he can click and see large one .</p>
  
  <p>So in this cases better to save images in different sizes.So you need to re-size it.So how we have to re-size and save it?</p>