this is log file:
2018-01-24T11:20:22.865825+00:00 app[web.1]: npm ERR! missing script: start
2018-01-24T11:20:22.873590+00:00 app[web.1]:
2018-01-24T11:20:22.873869+00:00 app[web.1]: npm ERR! A complete log of this run
can be found in:
2018-01-24T11:20:22.873936+00:00 app[web.1]: npm ERR! /app/.npm/_logs/2018-01-24T11_20_22_867Z-debug.log
2018-01-24T11:20:22.931940+00:00 heroku[web.1]: Process exited with status 1
2018-01-24T11:20:22.945935+00:00 heroku[web.1]: State changed from starting to crashed
2018-01-24T11:20:36.935697+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/" host=firetodo.herokuapp.com request_id=5de4a770-d007-42e6-9450-7edbf746d064 fwd=“197.39.19.110” dyno= connect= service= status=503 bytes= protocol=https
2018-01-24T11:20:38.405704+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/favicon.ico" host=firetodo.herokuapp request_id=611d73af-f491-4ea8-ad41-9625c2e28f5f fwd=“197.39.19.110” dyno= connect= service= status=503 bytes= protocol=https
2018-01-24T11:45:29.690322+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/" host=firetodo.herokuapp request_id=e6977494-b030-48c8-8f79-e95d05711700 fwd=“197.39.19.110” dyno= connect= service= status=503 bytes= protocol=https
2018-01-24T11:45:34.106377+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/favicon.ico" host=firetodo.herokuapp request_id=09d16c24-35ff-4930-a7c2-ff2c0fa15c08 fwd=“197.39.19.110” dyno= connect= service= status=503 bytes= protocol=https
2018-01-24T11:45:41.177551+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=HEAD path="/" host=firetodo.herokuapp request_id=390ba626-8c8c-4909-a3f4-6d8ff21f6a3a fwd=“174.138.37.36” dyno= connect= service= status=503 bytes= protocol=https