Add notification that we will be utilizing scarf for docker and python downloads (#1503)
We've created a custom domain, downloads.unstructured.io that redirects
to quay.io
(using https://scarf.sh/). This custom domain allows us to swap the
underlying container registry without impacting users. It also provides
us with important metrics about container and package usage, without
surfacing PII
like IP addresses.
Python package follows the same pattern at packages.unstructured.io