* Allow specification of CSI staging and publishing directory path
* Add website documentation for stage_publish_dir
* Replace erroneous reference to csi_plugin.mount_config with csi_plugin.mount_dir
* Avoid requiring CSI plugins to be redeployed after introducing StagePublishDir
Current efs driver does not support telling it if its a `node` or a `controller`, and it will not print any error it will just ignore all other parameters then:(
So this will result in endpoint being `/tmp/csi.sock` and not `/csi/csi.sock` which will in turn break nomad/csi integration.
Also I changed the latest image tag to v1.3.2 to make sure anybody copy pasting this example is sure that it will work.
Tested on nomad 1.1.2
