我如何允许在Elixir中使用plug_cowboy的CORS？

defp deps do
  [
    {:plug_cowboy, "~> 2.0"}
  ]
end

defmodule MyApp.CORS do
  import Plug.Cowboy

  def init(opts), do: opts

  def call(conn, _opts) do
    conn
    |> put_resp_header("access-control-allow-origin", "*")
    |> put_resp_header("access-control-allow-methods", "GET, POST, PUT, DELETE, OPTIONS")
    |> put_resp_header("access-control-allow-headers", "authorization, content-type")
    |> put_resp_header("access-control-max-age", "86400")
  end
end

defp pipeline(_) do
  [
    ...
    {MyApp.CORS, []}
  ]
end