我无法通过heroku看到我的网站 . 为什么？有什么问题？我的日志是：
2017-01-07T09：01：05.406777 00:00 heroku [web.1]：进程退出状态137 2017-01-07T09：01：05.418855 00:00 heroku [web.1]：状态从开始变为崩溃2017-01-07T09：01：06.670282 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/”host = progettocloud.herokuapp.com request_id = 3cab0568-3af9- 47da-8f98-ed8828db9b3a fwd =“151.18.21.88”dyno = connect = service = status = 503 bytes = 2017-01-07T09：01：06.872148 00:00 heroku [router]：at = error code = H10 desc =“App崩溃“method = GET path =”/“host = progettocloud.herokuapp.com request_id = d2af6b74-852d-4edc-b4aa-9575222788ff fwd =”151.18.21.88“dyno = connect = service = status = 503 bytes = 2017-01- 07T09：01：07.301323 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = progettocloud.herokuapp.com request_id = 5b02133c-9589-4645 -a625-37a4b4f6e4b2 fwd =“151.18.21.88”dyno = connect = service = status = 503 bytes = 2017-01-07T09：01：07.329927 00:00 heroku [router]：at = error code = H10 desc =“App坠毁“method = GET path =”/“host = progettocloud.herokuapp.com request_id = 9f4497ae-0288-4cca-ac07-c24a627ba36a fwd =”151.18.21.88“dyno = connect = service = status = 503 bytes = 2017-01- 07T09：01：08.813181 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/”host = progettocloud.herokuapp.com request_id = db394667-435d-4711-8986- 9c17984fac08 fwd =“151.18.21.88”dyno = connect = service = status = 503 bytes = 2017-01-07T09：01：52.416224 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/”host = progettocloud.herokuapp.com request_id = 180677b2-c4d8-4af0-84a8-e3ede4af8f52 fwd =“151.18.21.88”dyno = connect = service = status = 503 bytes = 2017-01-07T09：01： 52.783132 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = progettocloud.herokuapp.com request_id = 7bd9234b-f394-4efd-934e-907d6e28618f fwd =“151.18.21.88”dyno = connect = service = status = 503 bytes = 2017-01-07T09：10：35.609452 00:00 heroku [router]：at = error code = H10 desc =“A pp崩溃“method = GET path =”/“host = progettocloud.herokuapp.com request_id = 02dfd2dc-cb74-4f09-9e87-a08ad9e26758 fwd =”151.18.21.88“dyno = connect = service = status = 503 bytes = 2017-01 -07T09：10：36.216100 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = progettocloud.herokuapp.com request_id = 09591202-8bee- 4680-8dc9-98c2422a2b6d fwd =“151.18.21.88”dyno = connect = service = status = 503 bytes =