title: Displaying dynamically generated images in Yesod
body: <p>I'm writing my first Yesod app.
  The application involves the user selecting to view a graph, dynamically generated based on data stored in a DB on the server.
  I know how to get the user request and create the image on the server's file system, but how do I create a response page presenting it?</p>
  
  <p>P.S. As I'm using GnuPlot to generate the image, I only know how to write it as a file to the file system, but If you happen to know how to get the data in memory it'll probably be even better.
  Thanks,</p>