Ignoring unsupported files (like mp4/pdf and cet...)

[slavoroi]

It would be nice if we could configure that the lambda would ignore all file types that are not images and redirect to the relevant bucket.
It was mentioned in this ticket.
I don't want to define behavior in the Cloudfront CDN manually every time I update your code and deploy.

[dougtoppin]

@slavoroi We will discuss this early this coming week and get back to you