This reformulates the section where we run DockerCoins
to better explain why we use images (and how they are
essential to the "ship" part of the action), and it
tells upfront that it will be possible to use images
from the Docker Hub (and skip altogether the part where
we run our own registry and build and push images).
It also reshuffles section headers a bit, because that
part had a handful of really small sections. Now we
have:
- Shipping images with a registry
- Running our application on Kubernetes
I think that's better.
It also paves the way to make the entire self-hosted
registry part optional.
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