-----> Detecting rake tasks
-----> Preparing app for Rails asset pipeline
       Running: rake assets:precompile
       /tmp/build_292563c5be1c44e4dd0e09461b5ede6c/vendor/bundle/ruby/2.4.0/gems/fog-1.23.0/lib/fog/rackspace/mock_data.rb:42: warning: key "name" is duplicated and overwritten on line 80
       DEPRECATION WARNING: The configuration option `config.serve_static_assets` has been renamed to `config.serve_static_files` to clarify its role (it merely enables serving everything in the `public` folder and is unrelated to the asset pipeline). The `serve_static_assets` alias will be removed in Rails 5.0. Please migrate your configuration files accordingly. (called from block in <top (required)> at /tmp/build_292563c5be1c44e4dd0e09461b5ede6c/config/environments/production.rb:47)
       /tmp/build_292563c5be1c44e4dd0e09461b5ede6c/vendor/bundle/ruby/2.4.0/gems/activesupport-4.2.0/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Fixnum is deprecated
       /tmp/build_292563c5be1c44e4dd0e09461b5ede6c/vendor/bundle/ruby/2.4.0/gems/activesupport-4.2.0/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Bignum is deprecated
       rake aborted!
       SystemStackError: stack level too deep