Imgix - Domain name checking

[Coysh]

On entering my imgix source, I incorrectly entered the protocol as well.
This errored the site with a
InvalidArgumentException: Domain must be passed in as fully-qualified domain name and should not include a protocol or any path element, i.e. "example.imgix.net".

From vendor/imgix/imgix-php/src/Imgix/UrlBuilder.php on line 37.

Should there by a pre-check before saving? Had to manually edit the project.yaml file and revert back

[khalwat]

We should either validate this, or strip the protocol before passing it in -- and at least throw a try/catch around it.

[alexwybraniec]

+1 for this. Going to make a PR for the Docs to make the requirement clearer.