Add civetweb to origins.md (#1207)

Signed-off-by: darkexplosiveqwx <[email protected]>

Author: darkexplosiveqwx

docs/main/origins.md

@@ -9,5 +9,6 @@ Pi-hole being a **advertising-aware DNS/Web server**, makes use of the following
 - [`dnsmasq`](https://www.thekelleys.org.uk/dnsmasq/doc.html) - a lightweight DNS and DHCP server
 - [`curl`](https://curl.haxx.se/) - A command-line tool for transferring data with URL syntax
 - [AdminLTE Dashboard](https://github.com/ColorlibHQ/AdminLTE) - premium admin control panel based on Bootstrap 3.x
+- [`civetweb`](https://github.com/civetweb/civetweb) -  Embedded C/C++ web server
 - [`sqlite3`](https://www.sqlite.org/index.html) - SQL Database engine