[RAILS] When deploying to Heroku, OpenApp causes an error

[9th] Deploy to Github & Heroku! Create a community service with Ruby on Rails https://youtu.be/26MmHYI4xCQ

Refer to this video and go to "Run Console" from the "more" button.

rails db:migrate

Execute.

After that, when I checked the app again, I was able to open it safely.

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