title: Use FormData in an HTTP Response in Deno/Oak
body: <p>I know that I can create a FormData in the client and send it to the server (in this case I'm using Deno/Oak), and read it from there.</p>
  <p>But is this possible vice versa?</p>
  <p>If I have a route in Oak, and I want it to send a multipart response (with one or more blobs, and with one or more strings), how can I do it?</p>