feat: implement labels variables

Author: Klaitos

main.tf

@@ -89,9 +89,10 @@ resource "google_compute_instance" "main" {
     block-project-ssh-keys       = true
   }
 
-  labels = {
-    container-vm = module.gce_container_sqlproxy.vm_container_label
-  }
+  labels = merge(
+    { container-vm = module.gce_container_sqlproxy.vm_container_label },
+    var.labels
+  )
 
   tags = [
     local.network_tag

variables.tf

@@ -70,3 +70,9 @@ variable "allow_public_ip" {
   type        = bool
   default     = false
 }
+
+variable "labels" {
+  description = "A set of key/value label pairs to assign to the vm."
+  type        = map(string)
+  default     = {}
+}