Merge branch 'readme' into 'master'

Update README with nvidia-docker2 package informations

See merge request nvidia/kubernetes/device-plugin!3

README.md

@@ -37,6 +37,18 @@ The list of prerequisites for running the NVIDIA device plugin is described belo
 The following steps need to be executed on all your GPU nodes.
 This README assumes that the NVIDIA drivers and nvidia-docker have been installed.
 
+Note that you need to install the nvidia-docker2 package and not the nvidia-container-toolkit.
+This is because the new `--gpus` options hasn't reached kubernetes yet. Example:
+```bash
+# Add the package repositories
+$ distribution=$(. /etc/os-release;echo $ID$VERSION_ID)
+$ curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | sudo apt-key add -
+$ curl -s -L https://nvidia.github.io/nvidia-docker/$distribution/nvidia-docker.list | sudo tee /etc/apt/sources.list.d/nvidia-docker.list
+
+$ sudo apt-get update && sudo apt-get install -y nvidia-docker2
+$ sudo systemctl restart docker
+```
+
 You will need to enable the nvidia runtime as your default runtime on your node.
 We will be editing the docker daemon config file which is usually present at `/etc/docker/daemon.json`:
 ```json