에러) at=error code=h10 desc="app crashed" in flask

에러화면

해결방법

web: gunicorn main:app --bind 0.0.0.0:${PORT}

if __name__ == "__main__":
  port = int(os.environ.get("PORT", 5000))
  app.run(host="0.0.0.0", port=port)