Add support for Spodcast (Spotify to RSS)

Hi, I was wondering if it would be possible to add support for Spodcast (https://github.com/Yetangitu/Spodcast) which is "a caching Spotify podcast to RSS proxy". This is something I think others may find handy for accessing Spotify content on generic Podcast applications. They offer a Docker image if that would make implementing easier.

Thank you!