We’re showing these kinds of logos bigger as of this PR:
https://github.com/alphagov/notifications-utils/pull/170
If we don’t increase the resolution of the asset to be bigger then it
will look blurry.
New image is `108px` high, which is `2 * 54px`, in order for it to look
as good as possible on retina screens.
We need to host these images somewhere. Let’s start off doing it in
the admin app, like we do for other email assets.
Eventually we should have a CDN in front of this.
Images lifted from
76ff2e0b6d/app/assets/images/crests
