Add terms of service (#33055)

app/controllers/api/v1/instances/terms_of_services_controller.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class Api::V1::Instances::TermsOfServicesController < Api::V1::Instances::BaseController
+  before_action :set_terms_of_service
+
+  def show
+    cache_even_if_authenticated!
+    render json: @terms_of_service, serializer: REST::PrivacyPolicySerializer
+  end
+
+  private
+
+  def set_terms_of_service
+    @terms_of_service = TermsOfService.live.first!
+  end
+end