Add one-click install to PikaPods (RSS-Bridge#3778)

Author: m3nu

README.md

@@ -154,6 +154,7 @@ Browse http://localhost:3000/
 [![Deploy on Scalingo](https://cdn.scalingo.com/deploy/button.svg)](https://my.scalingo.com/deploy?source=https://github.com/sebsauvage/rss-bridge)
 [![Deploy to Heroku](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy)
 [![Deploy to Cloudron](https://cloudron.io/img/button.svg)](https://www.cloudron.io/store/com.rssbridgeapp.cloudronapp.html)
+[![Run on PikaPods](https://www.pikapods.com/static/run-button.svg)](https://www.pikapods.com/pods?run=rssbridge)
 
 The Heroku quick deploy currently does not work. It might possibly work if you fork this repo and
 modify the `repository` in `scalingo.json`. See https://github.com/RSS-Bridge/rss-bridge/issues/2688