Broken link (where are the downloads?)

on this page: https://docs.docker.com/engine/installation/linux/ubuntu/#install-from-a-package under the Docker CE section, this link is offered: https://download.docker.com/linux/ubuntu/pool/stable-17.03/amd64/ wherefrom I should be able to see a selection of packages to download. instead I get:

404 Not Found

Code: NoSuchKey
Message: The specified key does not exist.
Key: linux/ubuntu/pool/stable-17.03/amd64/index.html
RequestId: 940103FA8D66D063
HostId: ffS6+KDdqT2V24W+NanOgzc+pqE538lez6JTKjEzVz+hHOQ5exE/2G93fGTxA42lIkSbhoj9cNI=
An Error Occurred While Attempting to Retrieve a Custom Error Document

Code: NoSuchKey
Message: The specified key does not exist.
Key: error.html

what is the proper link? I want to try downloading an image since installing from the repository doesn’t work

looking around I found this location, which contains the .deb file:

https://download.docker.com/linux/ubuntu/dists/xenial/pool/stable/amd64/

of course, installation via the package is also broken, but I had hoped to find earlier (non-broken) versions of Docker. they aren’t there. anyone know where I can find earlier versions?