secret key set in application.rb

config/application.rb

@@ -10,6 +10,7 @@ module Tonna
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 6.0
+    config.secret_key_base = ENV["SECRET_KEY_BASE"] 
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers