changed the agent_nodepools to be a list

terraform.tfvars.example

@@ -28,17 +28,21 @@ control_plane_server_type = "cpx11"
 
 # As for the agent nodepools, below is just an example, if you do not want nodepools, just use one,
 # and change the name to what you want, it need not be "agent-big" or "agent-small", also give them the subnet prefer.
-# For single node clusters set this equal to {}
-agent_nodepools = {
-  agent-big = {
+# For single node clusters set this equal to [] or just set the counts to 0
+# IMPORTANT: Once the cluster is created, you can change the count, and even set it to 0, but do not remove a nodepool from the list. 
+# You can add others at the end of the list if you want.
+agent_nodepools = [
+  {
+    name        = "agent-small",
+    server_type = "cpx11",
+    count       = 2
+  },
+  {
+    name        = "agent-large",
     server_type = "cpx21",
     count       = 1
   }
-  agent-small = {
-    server_type = "cpx11",
-    count       = 2
-  }
-}
+]
 
 # That will depend on how much load you want it to handle, see https://www.hetzner.com/cloud/load-balancer
 load_balancer_type        = "lb11"