Heroku 的文档怎么也看不懂,求救: https://devcenter.heroku.com/articles/rails3#local-workstation-setup
—————————————————————————— Write your app
You may be starting from an existing app. If not, a vanilla Rails 3 app will serve as a suitable sample app: …… ——————————————————————————
这一段完全没说究竟这段代码应该写在哪个目录下的哪个文件里,后面直接一句 git push heroku master 就把代码给 push 上去了,完全看不懂怎么操作,皑皑