使用 git hub 将应用程序部署到 heroku 时遇到某种错误。问题是，我不理解 heroku 日志和随之而来的错误。这是 Heroku 日志：
Marcuss-MacBook-Pro:Weather-App marcushurney$ heroku logs
2016-01-05T14:37:27.798077+00:00 app[web.1]: npm ERR! Please include the following file with any support request:
2016-01-05T14:37:27.798377+00:00 app[web.1]: npm ERR! /app/npm-debug.log
2016-01-05T14:37:27.786949+00:00 app[web.1]: npm ERR! node v5.1.1
2016-01-05T14:37:27.786556+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
2016-01-05T14:37:27.787856+00:00 app[web.1]: npm ERR! npm v3.3.12
2016-01-05T14:37:28.776245+00:00 heroku[web.1]: Process exited with status 1
2016-01-05T14:37:28.789412+00:00 heroku[web.1]: State changed from starting to crashed
2016-01-05T17:27:16.684869+00:00 heroku[web.1]: State changed from crashed to starting
2016-01-05T17:27:17.853743+00:00 heroku[web.1]: Starting process with command `npm start`
2016-01-05T17:27:20.423495+00:00 app[web.1]: npm ERR! node v5.1.1
2016-01-05T17:27:20.423130+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
2016-01-05T17:27:20.424111+00:00 app[web.1]: npm ERR! npm v3.3.12
2016-01-05T17:27:20.425937+00:00 app[web.1]: npm ERR! missing script: start
2016-01-05T17:27:20.422441+00:00 app[web.1]: npm ERR! Linux 3.13.0-71-generic
2016-01-05T17:27:20.426242+00:00 app[web.1]: npm ERR!
2016-01-05T17:27:20.426432+00:00 app[web.1]: npm ERR! If you need help, you may report this error at:
2016-01-05T17:27:20.426634+00:00 app[web.1]: npm ERR! <https://github.com/npm/npm/issues>
你必须告诉heroku从哪里开始：missing script: start。在你的 package.json 中，你应该有类似的内容this https://devcenter.heroku.com/articles/nodejs-support#customizing-the-build-process:
"scripts": {
"start": "node index.js"
}
Where index.js是你的切入点。
As an 选择 https://devcenter.heroku.com/articles/nodejs-support#default-web-process-type，您可以指定Procfile:
web: node index.js
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