title: How to set the background image of a html 5 canvas to .png image
body: <p>I would like to know how it is possible to set the background image of a canvas to a .png file. I do not want to add the image in the back of the canvas and make the canvas transparent. </p>
  
  <p>I want the user to be able to actually draw on that canvas with the background being the .png image so that I can extract it later as a .png with the drawings that the user made.</p>