feat: add option to set volume labels

main.tf

@@ -5,6 +5,7 @@ locals {
         volume_name = volume.name
         volume_size = volume.size
         server_id   = hcloud_server.server[server.name].id
+        server_name = server.name
       }
     ]
   ])
@@ -69,6 +70,14 @@ resource "hcloud_volume" "volume" {
   name      = each.value.volume_name
   size      = each.value.volume_size
   server_id = each.value.server_id
+  labels = merge(
+    {
+      provisioner = "terraform"
+      project     = var.hcloud_project
+      server      = each.value.server_name
+    },
+    try(each.value.labels, {})
+  )
 }
 
 resource "hcloud_ssh_key" "key" {