Offer example image to "try it out" #16
Description
https://divy123.github.io/colorimetry/public/ works great!
Let's have an example image available so that people can go through the process in a more controlled way, and understand how it's /supposed/ to work. This will also help people demo the app to each other.
We can have it say:
Drag your image into this box or click here to select an image. Or, _use an example image_
What do you think?