To enhance container security by remapping a container's `root` user to a non-root user on the host system, what specific daemon feature must be enabled?

To enhance container security by remapping a container's `root` user to a non-root user on the host system, the specific daemon feature that must be enabled is User Namespace Remapping. A User Namespace is a Linux kernel feature that isolates user and group IDs, allowing a process to have a privileged `root` user within its own namespace without being the `root` user (UID 0) on the host system. This separation is crucial for security. When User Namespace Remapping is active, the container engine daemon, such as the Docker daemon, creates a new User Namespace for eac....