Added HestiaCP to Server Control Panel (#515)

* Added HestiaCP - Open Source Web Server Manager

Co-authored-by: Rabenherz112 <rabenherz@theravenhub.com>
Co-authored-by: Christoph Schläpfer <c.schlaepfer@datact.ch>
Co-authored-by: nodiscc <nodiscc@gmail.com>

README.md

@@ -217,6 +217,7 @@ Web hosting and server or service control panels.
 - [Ajenti](https://ajenti.org/) - Control panel for Linux and BSD. ([Source Code](https://github.com/ajenti/ajenti)) `MIT` `Python/Shell`
 - [Cockpit](https://cockpit-project.org/) - Web-based graphical interface for servers. ([Source Code](https://github.com/cockpit-project/cockpit)) `LGPL-2.1` `C`
 - [Froxlor](https://froxlor.org/) - Lightweight server management software with Nginx and PHP-FPM support. ([Source Code](https://github.com/Froxlor/Froxlor/)) `GPL-2.0` `PHP`
+- [HestiaCP](https://hestiacp.com/) - Web server control panel (fork of VestaCP). ([Demo](https://demo.hestiacp.com:8083/login/), [Source Code](https://github.com/hestiacp/hestiacp)) `GPL-3.0` `PHP/Shell/Other`
 - [ISPConfig](https://www.ispconfig.org) - Manage Linux servers directly through your browser. ([Source Code](https://git.ispconfig.org/ispconfig/ispconfig3)) `BSD-3-Clause` `PHP`
 - [Sentora](https://sentora.org/) - Open-Source Web hosting control panel for Linux, BSD (fork of ZPanel). ([Source Code](https://github.com/sentora/sentora-core)) `GPL-3.0` `PHP`
 - [VestaCP](https://vestacp.com/) - Open-Source hosting control panel. ([Source Code](https://github.com/serghey-rodin/vesta)) `GPL-3.0` `PHP/Shell/Other`