Add conditional expose directive (#853)

Author: swetha1654

terraform/main.tf

@@ -16,4 +16,9 @@ resource "juju_application" "machine_postgresql" {
   units       = var.units
   constraints = var.constraints
   config      = var.config
+
+  dynamic "expose" {
+    for_each = var.enable_expose ? [1] : []
+    content {}
+  }
 }

terraform/variables.tf

@@ -50,3 +50,9 @@ variable "config" {
   type        = map(string)
   default     = {}
 }
+
+variable "enable_expose" {
+  type        = bool
+  default     = true
+  description = "Whether to expose the application"
+}