Images for Magic Afternoon grouping exercise.
This is to support a 4x4 grid of 400x400 pixel images, numbered from 1 through 16 with eight unique images, suitable for a Husker Du game.
For example (the param ID goes in and should be from 1 through 16):
https://hook.io/outsourcedguru/magic-afternoon-01/1
The microservice will return, for example: "https://user-images.githubusercontent.com/15971213/35172811-032b6792-fd1e-11e7-950a-4d0f8dace31b.jpg"