File _service of Package owncast

<services>
  <service name="download_url">
    <param name="url">https://github.com/owncast/owncast/releases/download/v0.1.3/owncast-0.1.3-linux-64bit.zip</param>
    <param name="filename">owncast-0.1.3-linux-64bit.zip</param>
  </service>
</services>