precompile実行
new file:   public/assets/application-9e52c492490d144ad0af871ba0bf7ed7.css
new file:   public/assets/application-9e52c492490d144ad0af871ba0bf7ed7.css.gz
modified:   public/assets/manifest-7592299a8d46bf5bde18af4d24c608ff.json