It's a situation where 'Docker' has become eponymous with 'container'. But 'Docker' in this case refers to the runtime that Kubernetes uses to run container ima

It's a situation where 'Docker' has become eponymous with 'container'. But 'Docker' in this case refers to the runtime that Kubernetes uses to run container images on servers ('nodes') where the UI/UX features of Docker (like it's CLI, image building capabilities, etc.) are not needed. Container images nowadays can be built by a variety of tools, and run by a variety of tools, with Docker likely being the most popular end-user tool with the most history and name recognition. Others like Podman/Buildah are differently-architected replacements. As long as a container meets the open container specs, it can be built with whatever tool and run on whatever tool that also follows the specs.