add volume_size

variables.tf

@@ -58,4 +58,10 @@ variable "instance_type" {
           )
           error_message = "Instance_type must be set to a valid vm instance type."
       }
+}
+
+variable "volume_size" {
+  description = "Instance volume size in Gigabytes"
+  default = 10
+  type = number
 }