I have read on some forums and tutorials that windows server offers a containers feature. I suppose this is a kind of "docker" but for windows. I tried to add the feature in the server manager but the container item is not available. Is it because a i need a special edition or version of windows server ?
Or is there a way to download the feature ?
The container feature is only available starting with Windows Server 2016 which is not released yet but you can test it with the technical preview versions of it
See the FAQ for it:
What are the prerequisites for Windows Server Containers and Hyper-V Containers?
Both Window Server Containers and Hyper-V Containers require Windows Server 2016. These technologies will not work with previous versions of Windows.