Bring modules list from rails/all to application.rb

This is the default list in Rails 6.0

config/application.rb

@@ -1,6 +1,25 @@
 require_relative 'boot'
 
-require 'rails/all'
+require "rails"
+[
+  "active_record/railtie",
+  "active_storage/engine",
+  "action_controller/railtie",
+  "action_view/railtie",
+  "action_mailer/railtie",
+  "active_job/railtie",
+  "action_cable/engine",
+  "action_mailbox/engine",
+  "action_text/engine",
+  "rails/test_unit/railtie",
+  "sprockets/railtie",
+].each do |railtie|
+  begin
+    require railtie
+  rescue LoadError
+  end
+end
+
 require_relative "../lib/open_food_network/i18n_config"
 
 require_relative '../lib/spree/core/environment'