fix example (#176)

quickstart/201-web-app-docker-acr/variables.tf

@@ -1,35 +1,35 @@
-variable "name" {
-  type        = "string"
-  description = "Location of the azure resource group."
-  default     = "demo-tfquickstart"
+variable "prefix" {
+  type        = string
+  description = "Prefix of the resource name"
+  default     = "web-app-docker-acr"
 }
 
 variable "environment" {
-  type        = "string"
+  type        = string
   description = "Name of the deployment environment"
   default     = "dev"
 }
 
 variable "location" {
-  type        = "string"
+  type        = string
   description = "Location to deploy the resource group"
-  default     = "West US 2"
+  default     = "eastus"
 }
 
 variable "dns_prefix" {
-  type        = "string"
+  type        = string
   description = "A prefix for any dns based resources"
   default     = "tfq"
 }
 
 variable "plan_tier" {
-  type        = "string"
+  type        = string
   description = "The tier of app service plan to create"
   default     = "Standard"
 }
 
 variable "plan_sku" {
-  type        = "string"
+  type        = string
   description = "The sku of app service plan to create"
   default     = "S1"
 }