Change about page to be mounted in the web UI (#19345)

app/serializers/rest/domain_block_serializer.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class REST::DomainBlockSerializer < ActiveModel::Serializer
+  attributes :domain, :digest, :severity, :comment
+
+  def domain
+    object.public_domain
+  end
+
+  def digest
+    object.domain_digest
+  end
+
+  def comment
+    object.public_comment if instance_options[:with_comment]
+  end
+end