add image for non-existent domain error page
add image for non-existent domain error page

refs: CNVS-10531

Adds an image used in the changes for g/30445.

Change-Id: If5c76a09839fb9e2c0dffc0d5f5f1ef403495e04
Reviewed-on: https://gerrit.instructure.com/30443
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Anthus Williams <9b0bb6d8221e7e7c0d84e929f259a97887b2819e@instructure.com>
Reviewed-by: Jacob Fugal <f862f167b85d41b225785c70d70808bc7337c1fe@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: Nick Cloward <9cc571ed222c7ca8c35f018ff48a612f8cadeb73@instructure.com>

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