Do not require unnecessary components

config/application.rb

@@ -1,6 +1,16 @@
 require_relative "boot"
 
-require "rails/all"
+require "rails"
+# Pick the frameworks you want:
+require "active_model/railtie"
+require "active_job/railtie"
+require "active_record/railtie"
+require "action_controller/railtie"
+require "action_mailer/railtie"
+require "action_view/railtie"
+# require "action_cable/engine" # Exclude ActionCable
+# require "active_storage/engine" # Exclude ActiveStorage
+# require "action_mailbox/engine" # Exclude ActionMailbox
 
 Bundler.require(*Rails.groups)
 

config/environments/development.rb

@@ -32,7 +32,7 @@
   end
 
   # Store uploaded files on the local file system (see config/storage.yml for options).
-  config.active_storage.service = :local
+  # config.active_storage.service = :local
 
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false

config/environments/test.rb

@@ -28,7 +28,7 @@
   config.action_controller.allow_forgery_protection = false
 
   # Store uploaded files on the local file system in a temporary directory.
-  config.active_storage.service = :test
+  # config.active_storage.service = :test
 
   config.action_mailer.perform_caching = false