Added terraform.tfvars.example and updated Readme.md file on usage of…

… tfvars

README.md

@@ -23,3 +23,7 @@ The Harvester console can be accessed using an Elastic IP created by the sample.
 A random token and password will be generated for your example.
 
 If you provide a Rancher API URL and keys, your Harvester environment can be managed by Rancher and a kubeconfig file will be saved locally.
+
+### Using `terraform.tfvars.example` to Override Variable Values
+
+You can use the `terraform.tfvars.example` file to override the default values in `variables.tf`. To do this, rename the example File from `terraform.tfvars.example` to `terraform.tfvars`.

terraform.tfvars.example

@@ -0,0 +1,11 @@
+harvester_version = "v1.3.1"
+hostname_prefix   = "test-harvester"
+node_count        = "3"
+project_name      = "Harvester Labs"
+plan              = "m3.small.x86"
+#max_bid_price     = "0.17"
+metro             = "SV"
+spot_instance     = true
+ssh_key           = ""   
+num_of_vlans = 0
+use_cheapest_metro = true