Ruby on Rails tutorial demo app, set up using scaffolding!

This is the second application for the Ruby on Rails Tutorial.

Once postgres is setup, before this can be run in production:

• Run /usr/local/Cellar/postgresql/11.3//bin/createuser -s postgres to create a user called postgres
  • Only need to do this once per computer, and the username can be whatever you want
• Change username in config/database.yml to the username that you created in the above step
• Create a .env file with your HELLO_APP_DATABASE_PASSWORD. In order to create a random password, you can run rails secret.
• Run bundle exec rake db:create:all to create the databases locally.
• Don't forget to run heroku run rails db:migrate for migrating a new database on heroku!