To use Docker images, you need to install the Docker software itself. See the installation details at the official Docker site; below are some download shortcuts for your convenience.

• If you are running Linux: Centos, Debian, Fedora, Ubuntu, any other Linux variety. You may also to examine this article in Docker manuals.
• If you are running macOS: macOS Docker setup manual.
• If you are running Windows: Windows Docker setup manual.

If you are going to use Docker Compose, you may want to install it as well; see details here.