Okey so I ended up working on both parts,

• the regex check for urls containing an image suffix e.g. (.gif, .png)

and

• regular urls as shown in the bounty description that requires an async request to check if the url is for an image.

Here's a 4 minute video demo:

https://www.loom.com/share/028b0dfd00da4aa49827d285c2320209

any feedback from stackers here would be appreciated, and of course from the guys at SN HQ. thanks