The different installers for the Denodo Platform are available in the Denodo Support Site. In order to access to all different type of installers, such as the "denodo-container-7.0" including a Docker image with the Denodo Platform 7.0 update 20190903, you need a valid support user.
If you do not have a valid support user, maybe someone in your company can access to the support site. If you are working on a project or you want to do a proof of concept, you can also contact firstname.lastname@example.org or fill out this contact form https://www.denodo.com/action/contact-us/
Hope this clarifies!