As a prerequisite, it is assumed that your application is already deployed.
First, if the app file has changed, let's commit to merge on GitHub!
Type the following command in the terminal
Terminal
% git add .
% git commit -m "Put an explanation here so that you can understand the changed contents, even in Japanese"
Repository push
Terminal
% git push heroku master
Perform migration
Terminal
% heroku run rake db:migrate
Thank you for your hard work, if there are no errors, you're done!
What to do if an error occurs, execute the following command to get a hint
Terminal
% heroku logs --tail --app <<Application name>>
Thank you for watching till the end! I hope it helps someone