Make this a suggestion instead of a default

Otherwise Chrome is going to prompt automatically to install the app as
a web app. Thats a bit too much out of the box.

Author: dhh

railties/lib/rails/generators/rails/app/templates/config/routes.rb.tt

@@ -7,8 +7,8 @@ Rails.application.routes.draw do
 
   <%- unless options.api? -%>
   # Render dynamic PWA files from app/views/pwa/*
-  get "service-worker" => "rails/pwa#service_worker", as: :pwa_service_worker
-  get "manifest" => "rails/pwa#manifest", as: :pwa_manifest
+  # get "service-worker" => "rails/pwa#service_worker", as: :pwa_service_worker
+  # get "manifest" => "rails/pwa#manifest", as: :pwa_manifest
 
   <%- end -%>
   # Defines the root path route ("/")