@type t() :: %Brix.Site{
  domain: String.t() | nil,
  extra: map() | nil,
  favicon: String.t() | nil,
  meta_description: String.t() | nil,
  meta_title: String.t() | nil,
  name: String.t() | nil,
  og_image: String.t() | nil,
  tagline: String.t() | nil
}