deploy on heroku a docker-image of this repo : https://github.com/scrapinghub/splash.git
i changed the EXPOSE port to be 80, but when i try to access the running image outside i see in logs a 503 Error
2019-11-22T15:59:04.544693+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=secure-sands-92682.herokuapp.com request_id=50a2abef-d1c5-4587-98e9-d03638d86695 fwd="129.0.76.114" dyno= connect= service= status=503 bytes= protocol=http
Dont expose it on port 80. Expose it on $PORT where PORT is an environment variable set by heroku
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