我正在使用Rails 3.1.3創(chuàng)建一個Rails應用程序：git initgit remote add heroku <my heroku repo>git add .git commit -a -m "First commit"git push heroku master得到：Counting objects: 102, done.Delta compression using up to 4 threads.Compressing objects: 100% (86/86), done.Writing objects: 100% (102/102), 315.47 KiB, done.Total 102 (delta 3), reused 0 (delta 0)**-----> Heroku receiving push !     Heroku push rejected, no Cedar-supported app detected**To git@heroku.com:electric-dusk-3217.git ! [remote rejected] master -> master (pre-receive hook declined)error: failed to push some refs to <my heroku rep>