Backend Training: FactoryBot Upgrade

🔖 : factory_bot,

To upgrade to FactoryBot from FactoryGirl you need to replace all text FactoryGirl to FactoryBot. You can do that by using the atom build-in project search Command ⌘+Shift+f.

For details on files changed, please refer to this commit

p.s. ignore the changes in Gemfile.lock