Improve initializer template

Author: bogdan

lib/templates/initializer.rb

@@ -1,5 +1,27 @@
 JsRoutes.setup do |c|
   # Setup your JS module system:
-  # ESM, CJS, AMD, UMD or nil
+  # ESM, CJS, AMD, UMD or nil.
   # c.module_type = "ESM"
+
+  # Legacy setup for no modules system.
+  # Sets up a global variable `Routes`
+  # that holds route helpers.
+  # c.module_type = nil
+  # c.namespace = "Routes"
+
+  # Follow javascript naming convention
+  # but lose the ability to match helper name
+  # on backend and frontend consistently.
+  # c.camel_case = true
+
+  # Generate only helpers that match specific pattern.
+  # c.exclude = /^api_/
+  # c.include = /^admin_/
+
+  # Generate `*_url` helpers besides `*_path`
+  # for apps that work on multiple domains.
+  # c.url_links = true
+
+  # More options:
+  # @see https://github.com/railsware/js-routes#available-options
 end