The parameter is still required in production so it turned out
1 files changed, 3 insertions(+), 0 deletions(-)

M config/application.rb
M config/application.rb +3 -0
@@ 31,6 31,9 @@ module Rsstweet
     # -- all .rb files in that directory are automatically loaded after loading
     # the framework and any gems in your application.
 
+    # this isn't actually used but railties *production* checks this variable during boot.
+    config.secret_key_base = "herp a derp"
+
     config.middleware.delete ActionDispatch::HostAuthorization
     config.middleware.delete ActionDispatch::Cookies
     config.session_store :disabled