Heroku push rejected, no Cedar-supported app detected

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I had a similar problem, but with Django (incorrectly named “requirements.txt”). I think to generalize the other answers here, when you get this error it’s because Heroku is missing some key file that it uses to identify your app (and its type).

  • php: index.php
  • python: requirements.txt
  • ruby: Gemfile # note the capitalization
  • node: package.json

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