しばらくの間web.1が2台動いてた感じ。落ちてると思ったら落ちてなかったのかな？
2018-03-21T09:41:16.280824+00:00 heroku web.1 - - State changed from up to down
2018-03-21T09:41:16.281603+00:00 heroku web.1 - - State changed from down to starting
:
2018-03-21T09:41:43.198684+00:00 app web.1 - - [paperclip] saving preview_cards/images/…
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2018-03-21T09:41:58.782572+00:00 heroku web.1 - - State changed from starting to up