Only enable lookbook in local and dev

Author: lorenyu

app-rails/config/routes.rb

@@ -7,7 +7,7 @@
   # Keep the default /up rails endpoint.
   get "up" => "rails/health#show"
 
-  mount Lookbook::Engine, at: "/lookbook"
+  mount Lookbook::Engine, at: "/lookbook" if ENV["ENABLE_LOOKBOOK"].present?
 
   # Support locale prefixes for these routes:
   localized do

app-rails/local.env.example

@@ -42,3 +42,9 @@ DB_HOST=127.0.0.1
 DB_NAME=app
 DB_USER=app
 DB_PASSWORD=secret123
+
+############################
+# Lookbook
+############################
+
+ENABLE_LOOKBOOK=true

infra/app/app-config/dev.tf

@@ -23,6 +23,10 @@ module "dev_config" {
   # Defaults to `false`. Uncomment the next line to enable.
   # enable_command_execution = true
 
+  service_override_extra_environment_variables = {
+    ENABLE_LOOKBOOK = "true"
+  }
+
   # Uncomment to override default feature flag values
   feature_flag_overrides = {
     BAR = true