Update README.md

Author: Sandido

src/vm-repair/README.md

@@ -1,5 +1,7 @@
 # Azure CLI VM Repair Extension #
-This is a extension for repairing VMs.
+This is an extension for repairing VMs. Usually this is used to repair VMs that cannot boot by copying the 
+OS Disk to a separate repair VM copy and run [repair scripts](https://github.com/Azure/repair-script-library) against it. 
+You can also create then run your own custom repair scripts, seen in the `--custom-script-file` parameter in the `az vm repair run` command. 
 
 ### How to use ###
 Install this extension using the below CLI command
@@ -8,11 +10,15 @@ az extension add --name vm-repair
 ```
 
 ### Sample Commands ###
-Repair create command
+Create repair VM command
 ```
 az vm repair create -g MyResourceGroup -n myVM --verbose
 ```
-Restore command
+Run a repair script on the new repair VM
+```
+az vm repair run -g MyResourceGroup -n MySourceWinVM --run-id win-hello-world --run-on-repair --verbose
+```
+Restore the now fixed copied OS disk from the repair VM to the original VM
 ```
 az vm repair restore -g MyResourceGroup -n myVM --verbose
-```
+```