Docker can run on both Windows and Linux platforms.
For the Windows platform, docker atleast needs Windows 10 64bit with 2GB RAM space. For the lower versions, docker can be installed by taking help of the toolbox. Docker can be downloaded from https://docs.docker.com/docker-for-windows/ website.
For Linux platforms, Docker can run on various Linux flavors such as Ubuntu >=12.04, Fedora >=19, RHEL >=6.5, CentOS >=6 etc.
