1.2. Running containers without Docker

Red Hat removed the Docker container engine and the docker command in RHEL 8.

If you still want to use Docker in RHEL, you can get Docker from different upstream projects, but it is unsupported in RHEL 10.

You can install the podman-docker package, every time you run a docker command, it actually runs a podman command.
Podman also supports the Docker Socket API, so the podman-docker package also sets up a link between /var/run/docker.sock and /var/run/podman/podman.sock. As a result, you can continue to run your Docker API commands with docker-py and docker-compose tools without requiring the Docker daemon. Podman will service the requests.
The podman command, like the docker command, can build container images from a Containerfile or Dockerfile. The available commands that are usable inside a Containerfile and a Dockerfile are equivalent.
Options to the docker command that are not supported by podman include network, node, plugin (podman does not support plugins), rename (use rm and create to rename containers with podman), secret, service, stack, and swarm (podman does not support Docker Swarm). The container and image options are used to run subcommands that are used directly in podman.