Improve ZTA experience

lib/livebook/teams/deployment_group.ex

@@ -21,8 +21,15 @@ defmodule Livebook.Teams.DeploymentGroup do
   end
 
   def changeset(deployment_group, attrs \\ %{}) do
-    deployment_group
+    changeset =
-    |> cast(attrs, [:id, :name, :mode, :hub_id, :clustering, :zta_provider, :zta_key])
+      deployment_group
-    |> validate_required([:name, :mode])
+      |> cast(attrs, [:id, :name, :mode, :hub_id, :clustering, :zta_provider, :zta_key])
+      |> validate_required([:name, :mode])
+
+    if get_field(changeset, :zta_provider) do
+      validate_required(changeset, [:zta_key])
+    else
+      changeset
+    end
   end
 end

lib/livebook_web/components/app_components.ex

@@ -91,7 +91,7 @@ defmodule LivebookWeb.AppComponents do
 
   def deployment_group_form_content(assigns) do
     ~H"""
-    <div class="grid grid-cols-1 md:grid-cols-2 gap-3">
+    <div>
       <div class="flex flex-col">
         <.select_field
           label="Clustering"
@@ -137,9 +137,10 @@ defmodule LivebookWeb.AppComponents do
             field={@form[:zta_provider]}
             help={
               ~S'''
-              Enable this option if you want
+              Enable this option to generate
-              to deploy your notebooks behind
+              Livebook Dockerfiles with proxy
-              an authentication proxy
+              authentication for deployed
+              notebooks
               '''
             }
             prompt="None"