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Discussion on: How to deploy a Webapp to Heroku (Node.js, React.js and MongoDB)

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Thiago Pacheco

Hi Leo, thank you!
Usually when you get error 503 is because there was something wrong with the deployment.
You can use the heroku logs to check what happened:

heroku logs

Take a look at the docs here for more info:
devcenter.heroku.com/articles/logging