API namespace for routes

config/routes.rb

@@ -3,7 +3,13 @@ Rails.application.routes.draw do
 
   root to: "welcome#root"
 
-  resources :pokemon
-  post 'pokemon/upload', to: 'pokemon#upload'
-
+  namespace :api, defaults: { formats: :json } do
+    namespace :v1 do
+      resources :pokemon do
+        collection do
+          post :upload
+        end
+      end
+    end
+  end
 end