Set default value for environment variable in Terraform configuration

Author: JeanFraga

terraform/variables.tf

@@ -12,6 +12,7 @@ variable "region" {
 variable "environment" {
   description = "The environment name"
   type        = string
+  default     = "dev"
   validation {
     condition = contains(["dev", "staging", "prod"], var.environment)
     error_message = "Environment must be one of: dev, staging, prod."