dynamic allocation of image to generate og:image

[gouravg8]

• og:image is generated on each news article dynamically,
  it should allocate the URL of the image like this:
  when generating the metadata's image of an opengraph, if the image is already a URL (because I'm storing the direct URL of the image of an article) then put it directly to it as it is
  url: post.image
  , otherwise, add the current hostname of the page like this:
  url : hostname + "/api/og?image" + post.image