Make postcode service call error endpoint

app/controllers/start_controller.rb

@@ -9,4 +9,8 @@ class StartController < ApplicationController
       render "home/index"
     end
   end
+
+  def error
+    render json: { status: 503, error: "Service unavailable" }, status: :service_unavailable
+  end
 end

app/services/address_client.rb

@@ -51,6 +51,7 @@ private
   end
 
   def response
-    @response ||= http_client.request_get(endpoint_uri)
+    # @response ||= http_client.request_get(endpoint_uri)
+    @response ||= http_client.request_get("localhost:3000/error")
   end
 end

app/services/uprn_client.rb

@@ -46,6 +46,7 @@ private
   end
 
   def response
-    @response ||= http_client.request_get(endpoint_uri)
+    @response ||= http_client.request_get("localhost:3000/error")
+    # @response ||= http_client.request_get(endpoint_uri)
   end
 end

config/routes.rb

@@ -33,6 +33,7 @@ Rails.application.routes.draw do
   root to: "start#index"
   get "/guidance", to: "start#guidance"
 
+  get "/error", to: "start#error"
   get "/logs", to: redirect("lettings-logs")
   get "/accessibility-statement", to: "content#accessibility_statement"
   get "/privacy-notice", to: "content#privacy_notice"