body: Im building a simple website where people can save links and eventually share them with others.
  
  
  When a user enters an url, I fetch the meta data to present the link. 
  The text, like title and description, Im just saving in a database however Im in doubt what I should do with the image.
  
  
  Should I just always deeplink to the external image? Or can I save the image on my server? What are the legal options here?
  I can see that facebook seems to save their own copy of images that are shared through them.
  
  
  (The image will always be used in context with a link to the original link)
  
  
  
title: How to legally serve og:image