Add/configure ActiveStorage

config/environments/development.rb

@@ -70,4 +70,7 @@ Rails.application.configure do
 
   # Allow requests from any IP
   config.web_console.whiny_requests = false
+
+  # Store attachments on the local disk (in ./storage)
+  config.active_storage.service = :local
 end

config/environments/production.rb

@@ -110,6 +110,10 @@ Rails.application.configure do
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   config.action_mailer.raise_delivery_errors = true
 
+  # TODO make configurable
+  # Store attachments in S3-compatible back-end
+  config.active_storage.service = :local
+
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).
   config.i18n.fallbacks = true

config/environments/test.rb

@@ -51,4 +51,7 @@ Rails.application.configure do
   }
 
   config.active_job.queue_adapter = :test
+
+  # Store attachments on the local disk (in ./tmp)
+  config.active_storage.service = :test
 end