Chore(docs): Udpate pre-requisite content (#499)

Signed-off-by: udit <[email protected]>

Author: uditgaurav

docs/disk-fill.md

@@ -26,7 +26,7 @@ sidebar_label: Disk Fill
 - Ensure that the Litmus Chaos Operator is running by executing `kubectl get pods` in operator namespace (typically, `litmus`). If not, install from [here](https://v1-docs.litmuschaos.io/docs/getstarted/#install-litmus)
 - Ensure that the `disk-fill` experiment resource is available in the cluster by executing `kubectl get chaosexperiments` in the desired namespace If not, install from [here](https://hub.litmuschaos.io/api/chaos/master?file=charts/generic/disk-fill/experiment.yaml)
 - Cluster must run docker container runtime
-- Appropriate Ephemeral Storage Requests and Limits should be set for the application before running the experiment. 
+- Either an appropriate Ephemeral Storage Requests and Limits should be set for the application or `EPHEMERAL_STORAGE_MEBIBYTES` ENV should be defined in the ChaosEngine before running the experiment. 
   An example specification is shown below:
 
 ```

docs/getstarted.md

@@ -7,7 +7,7 @@ sidebar_label: Introduction
 
 ## Pre-requisites
 
-Kubernetes 1.15 or later.
+Kubernetes 1.16 or later.
 
 ## Getting Started
 
@@ -19,8 +19,6 @@ Running chaos on your application involves the following steps:
 
 [Setup Service Account](#setup-service-account)
 
-[Annotate your application](#annotate-your-application)
-
 [Prepare ChaosEngine](#prepare-chaosengine)
 
 [Run Chaos](#run-chaos)

docs/pod-dns-error.md

@@ -165,11 +165,11 @@ subjects:
     <td> CONTAINER_RUNTIME  </td>
     <td> container runtime interface for the cluster</td>
     <td> Optional </td>
-    <td> Defaults to docker, supported values: docker, containerd and crio </td>
+    <td> Defaults to docker, supported values: docker </td>
   </tr>
   <tr>
     <td> SOCKET_PATH </td>
-    <td> Path of the containerd/crio/docker socket file </td>
+    <td> Path of the docker socket file </td>
     <td> Optional  </td>
     <td> Defaults to `/var/run/docker.sock` </td>
   </tr>

docs/pod-dns-spoof.md

@@ -159,11 +159,11 @@ subjects:
     <td> CONTAINER_RUNTIME  </td>
     <td> container runtime interface for the cluster</td>
     <td> Optional </td>
-    <td> Defaults to docker, supported values: docker, containerd and crio </td>
+    <td> Defaults to docker, supported values: docker </td>
   </tr>
   <tr>
     <td> SOCKET_PATH </td>
-    <td> Path of the containerd/crio/docker socket file </td>
+    <td> Path of the docker socket file </td>
     <td> Optional  </td>
     <td> Defaults to `/var/run/docker.sock` </td>
   </tr>