Hapi server on heroku fails to bind port

问题:

I'm working on a Hapi server for a ReactJS app but when I try to deploy to Heroku, I get the R10 error "Failed to bind to $PORT within 60 seconds of launch". What is going on? I'm using process.env.PORT. I also tried parseInt() around it. Also tried disabling varying packages. The build is successful always.

In the Heroku logs, I see the console log from the index.js ("Hapi running on ...") but then the R10 error shows up and the server restarts, then crashes.

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