ruby - Missing `secret_token` and `secret_key_base` for 'production' environment when login redmine - Stack Overflow
Securing Rails Applications — Ruby on Rails Guides
Rails×Capistrano】自動デプロイしようとしたら「ArgumentError: Missing `secret_key_base` for 'production' environment, set this string with `rails credentials:edit`」 - コードロード
secret_key_base not defined · Issue #72 · rails-api/rails-api · GitHub
Stop using the environment variables for sensitive keys in Rails - DEV Community
Greg Molnar on Twitter: "Did you know that you can create a single-file Rails application? You shouldn't unless you are experimenting with something, but here is how it can be done: 🧵