Stripe integrate backend

The marching orders for this are:

[x] Add create stripe user to create user logic + save stripe id to user info
[x] For create session plug in a) product id, b) success url and c) fail url
[x] For webhook plug in endpoint secret (save in env, remember this for later for your CICD)
[x] Add logic to frontend for handle purchase (basically just calling the function, stripe handles the rest)

sammybigbux / deckhub