You can push changes to Heroku by taking the following steps (learned in 2023-06-20):

• heroku git:remote -a your-app-name
  • Selected my DIMMiN app in Heroku
• git remote -v
  • Confirmed that the heroku version and github version were the same
• heroku run python manage.py migrate -a your-app-name
  • Make sure to update migrations if any apps are altered / changed
• git push heroku master
  • Pushed those new changes to the Heroku app. I should also add a Staging environment.