title: Check if file exists before showing image?
body: <p>I need to make an image gallery with a variable number of images. I'm making a loop that checks for a lot of image names, like image1, image2, image3 and so on. </p>
  
  <p>I need to make a condition so that it doesn't show a missing file icon if an image doesn't exists. How can I check if the file exists and if true show it?</p>
  
  <p>Thanks.</p>