RSS SVG
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https://idy.herokuapp.com/rss/0/http://chosa.itmedia.co.jp/rss#.svg
https://idy.herokuapp.com/rss/0/http://002tousan.seesaa.net/index.rdf#.svg
https://idy.herokuapp.com/rss/0/http://api.tetsudo.com/news/atom.xml#.svg
https://idy.herokuapp.com/rss/0/http://www.kyounoryouri.jp/rss/recipe_feed.xml#.svg
https://idy.herokuapp.com/rss/0/https://feeds.feedburner.com/moongift#.svg
2021/7/1 ダークモードに対応