Given our current implementation no longer has an IMG tag eg:

It should be quite easy to apply a CDN to the above and it saves traffic.
@vinothkannans can you fix this up so preview uses the CDN url
Instead of preview showing:
<img src="//cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com/meta/original/3X/6/6/66ef078b3ef9da9aa1b3356cb21fe22a0d25eaf0.png" alt="image" class="resizable" width="345" height="149">
We should show the CDN URL which is this:
<img src="https://global.discourse-cdn.com/meta/original/3X/6/6/66ef078b3ef9da9aa1b3356cb21fe22a0d25eaf0.png" alt="image" class="resizable" width="345" height="149">
