我一直试图让我的应用程序进入Heroku，我能够推送它，然后我做了heroku ps：scale web = 1，当我打开Heroku时，我正在问候一个错误消息。
https://serene-waters-6648.herokuapp.com/ > application error
here is the log output:
jamess-air:mysite jameshemmaplardh$ heroku logs
Your version of git is 2.0.1. Which has serious security vulnerabilities.
More information here: https://blog.heroku.com/archives/2014/12/23/update_your_git_clients_on_windows_and_os_x
2015-01-23T01:28:38.179841+00:00 heroku[api]: Enable Logplex by jameshemmaplardh@gmail.com
2015-01-23T01:28:38.179841+00:00 heroku[api]: Release v2 created by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.103465+00:00 heroku[api]: Set DATABASE_URL config vars by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.103465+00:00 heroku[api]: Release v3 created by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.210960+00:00 heroku[api]: Release v4 created by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.210960+00:00 heroku[api]: Attach HEROKU_POSTGRESQL_NAVY resource by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.523763+00:00 heroku[api]: Scale to web=1 by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.621828+00:00 heroku[api]: Deploy e0497c1 by jameshemmaplardh@gmail.com
2015-01-23T01:42:31.621828+00:00 heroku[api]: Release v5 created by jameshemmaplardh@gmail.com
2015-01-23T01:42:36.935833+00:00 heroku[web.1]: Starting process with command `gunicorn gettingstarted.wsgi --log-file -`
2015-01-23T01:42:38.038530+00:00 app[web.1]: bash: gunicorn: command not found
2015-01-23T01:42:38.691433+00:00 heroku[web.1]: Process exited with status 127
2015-01-23T01:42:38.698984+00:00 heroku[web.1]: State changed from crashed to starting
2015-01-23T01:42:38.698153+00:00 heroku[web.1]: State changed from starting to crashed
我不知道如何解释这个，但从我的理解它应该工作，我的dynos不是空白。