Add billing (#329)

app/workflows/create_stripe_customer.rb

@@ -0,0 +1,15 @@
+require 'stripe'
+
+class CreateStripeCustomer
+  def run
+    tenant = Current.tenant_or_raise! # check that Current Tenant is set
+    owner = User.find_by(role: 'owner')
+
+    customer = Stripe::Customer.create({
+      email: owner.email,
+      name: owner.full_name,
+    })
+    tb = TenantBilling.first_or_create
+    tb.update!(customer_id: customer.id)
+  end
+end