[UX Demo] Velociraptor logo in GitLab style/colors

I've created a simple app for the UX Demo, named Velociraptor (as a play on Velocity, which is the goal we're showing). The app is here and has uses the image from our 404 page:

I'm thinking the demo script could include me replacing the GitLab logo with an image of a Velociraptor, but that fits the GitLab colors and style.

Part of #19793 (closed).