Missing `secret_key_base` for production environment

$ RAILS_ENV=production rake secret

$ bin/rails credentials:edit Adding config/master.key to store the encryption key: 58808d993e89239990a7053314a39ba9 Save this in a password manager your team can access. If you lose the key, no one, including you, can access anything encrypted with it.       create  config/master.key Ignoring config/master.key so it won't end up in Git history:       append  .gitignore No $VISUAL or $EDITOR to open file in. Assign one like this: VISUAL="mate --wait" bin/rails credentials:edit For editors that fork and exit immediately, it's important to pass a wait flag; otherwise, the file will be saved immediately with no chance to edit.