fix: config.secret_key_baseにcredentials.secret_key_baseを代入させた
fix: config.secret_key_baseにcredentials.secret_key_baseを代入させた

kosen-robocon-db/kosen-robocon-db,kosen-robocon-db/kosen-robocon-db,kosen-robocon-db/kosen-robocon-db