Fedora Workstation is a variant of Fedora, which was created when Fedora was split into different editions with Fedora 21's release. It provides a minimal image meant for deployment in cloud computing. It was discontinued in early 2019, making it's last release based on Fedora 29.
It used OSTree, which allows for rollbacks and making servers identical. This also makes it immutable, for better security. It also has Atomic CLI, which allows for managing Docker containers, system containers, Atomic Apps, and more.