Add Castopod to Blogging Platforms (#2850)

Co-authored-by: Yassine Doghri <doghri.yassine@gmail.com>

README.md

@@ -205,6 +205,7 @@ _See also: [WeblogMatrix](https://www.weblogmatrix.org/)_
 - [Bludit](https://www.bludit.com/) `⚠` - Simple application to build a site or blog in seconds. Bludit uses flat-files (text files in JSON format) to store posts and pages. ([Demo](https://demo.bludit.com/), [Source Code](https://github.com/bludit/bludit)) `MIT` `PHP`
 - [Cadmus](https://github.com/ldemafelix/cadmus) - Cadmus is an extremely lightweight, flat-file blogging platform powered by Markdown. `MIT` `PHP`
 - [Canvas](https://trycanvas.app/) - A Laravel publishing platform. ([Source Code](https://github.com/austintoddj/canvas)) `MIT` `PHP`
+- [Castopod](https://castopod.org) - A podcast management hosting platform that includes the latest podcast 2.0 standards, an automated Fediverse feed, analytics, an embeddable player, and more. [Source Code](https://code.castopod.org/adaures/castopod) `AGPL-3.0` `PHP`
 - [Chyrp Lite](https://chyrplite.net) - Extra-awesome, extra-lightweight blog engine. ([Source Code](https://github.com/xenocrat/chyrp-lite)) `BSD-3-Clause` `PHP`
 - [Dante Stories](https://dante-stories.herokuapp.com/) - Self hosted Medium platform built with Ruby on Rails. ([Source Code](https://github.com/michelson/dante-stories)) `MIT` `Ruby`
 - [Dotclear](https://dotclear.org/) - Take control over your blog. ([Source Code](https://hg.dotclear.org/dotclear)) `GPL-2.0` `PHP`