Add dotenv gem and stripe.js library
Add stripe api keys to gitignore and initializers
Add stripe to gemfile
Add stripe checkout

- Created charges controller
- Create charges route (nested in orders)
- Add "Pay with Card" button to order show page
- Add in_pennies method to Orders model
Update order "submitted at" upon checkout
Add @order_lines instance variable to charges

controller
Create partial for order_details
Add partial rendering to show order view and

create charges view
Add confirmation number to confirmation page
Add logic to save/retrieve order_id from

cookie when accessing root path
Modify charges controller such that redfire_order_id

gets deleted when charge is complete.
Remove signup rspec helpers - not needed
Disable unecessary helpers and opening of page