Add tagging support

resource.digitalocean_droplet.this.tf

@@ -8,5 +8,6 @@ resource "digitalocean_droplet" "this" {
   region             = var.region
   ssh_keys           = var.ssh_keys
   size               = var.size
+  tags               = var.tags
   vpc_uuid           = data.digitalocean_vpc.this.id
 }

variable.tags.tf

@@ -0,0 +1,4 @@
+variable "tags" {
+  default = []
+  type    = list(string)
+}