Docker CE vs EE on RHEL Server

Hello everyone,

My team is planning to deploy an application onto a system hosted on RHEL 7. We are planning to package the application as Docker containers. Our question is that whether can we run Docker for free or do we have to pay the license of Docker EE. The cause of confusion is the following:

https://docs.docker.com/engine/installation/linux/docker-ee/rhel/
https://www.docker.com/docker-red-hat-enterprise-linux-rhel

The documents on the above URLs clearly state that only Docker EE is supported on RHEL systems and an enrollment is required. However the following URL is a perfectly working step-by-step guide provided by redhat.com to install Docker on RHEL 7 and Atomic Host:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html-single/getting_started_with_containers/#get_started_with_docker_formatted_container_images

Can someone please help what are the exact license conditions for Docker on RHEL - can we use it just by installing it from the rhel-7-*-rpms repos or is it mandatory to obtain a Docker EE license? Thanks for all the help.