Creates Buttondown newsletter drafts from an RSS feed.
npm i https://github.com/chidiwilliams/rss-buttondownrss-buttondownRSS_URL: URL of the RSS feedBUTTONDOWN_API_KEY: Buttondown API keyMAX_RECENT_POST_AGE: Time difference to get the latest posts (in seconds). A value of "2592000", for example, will publish all posts from the last 30 days.