Billing (#1269)

* Change env SELF_HOSTING_ENABLED to SELF_HOSTED

* Initial Stripe implementation

* Fix portal link

* Use webhook signatures

* Migrated to new Stripe gem conventions

Also updated resource routing

* Added faraday-multipart gem to resolve middleware notice

* Merge fix

* Merge fix

* Temporary upgrade prompt for early access

* Lint fix

* i18n fixes

* Remove catch-all rescue

* Update .env.example

config/routes.rb

@@ -13,8 +13,11 @@ Rails.application.routes.draw do
     resource :profile, only: %i[show update destroy]
     resource :preferences, only: %i[show update]
     resource :hosting, only: %i[show update]
+    resource :billing, only: :show
   end
 
+  resource :subscription, only: %i[new show]
+
   resources :tags, except: %i[show destroy] do
     resources :deletions, only: %i[new create], module: :tag
   end
@@ -104,6 +107,9 @@ Rails.application.routes.draw do
 
   resources :currencies, only: %i[show]
 
+  # Stripe webhook endpoint
+  post "webhooks/stripe", to: "webhooks#stripe"
+
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.
   # Can be used by load balancers and uptime monitors to verify that the app is live.
   get "up" => "rails/health#show", as: :rails_health_check