revise preqs for install docs

docs/install.md

@@ -1,12 +1,14 @@
 # Installation
 
 ## Prerequisites
+
+* Kubernetes Version >= 1.20 
+
+* If you are using a self managed cluster, ensure the flag `--allow-privileged=true` for `kube-apiserver`.
+
+* Important: If you intend to use the csi-snapshotter functionality, the [CSI Snapshotter](https://github.com/kubernetes-csi/external-snapshotter). **must be installed before** the EBS CSI driver.
+
 * If you are managing EBS volumes using static provisioning, get yourself familiar with [EBS volume](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AmazonEBS.html).
-* Get yourself familiar with how to setup Kubernetes on AWS and have a working Kubernetes cluster:
-  * Enable flag `--allow-privileged=true` for `kube-apiserver`
-  * Enable `kube-apiserver` feature gates `--feature-gates=CSINodeInfo=true,CSIDriverRegistry=true,CSIBlockVolume=true,VolumeSnapshotDataSource=true`
-  * Enable `kubelet` feature gates `--feature-gates=CSINodeInfo=true,CSIDriverRegistry=true,CSIBlockVolume=true`
-* If you intend to use the csi-snapshotter functionality you will need to first install the [CSI Snapshotter](https://github.com/kubernetes-csi/external-snapshotter).
 
 ## Installation
 #### Set up driver permission