add codeberg mirror link thingy

README.md

@@ -2,6 +2,10 @@
 
 > The main concept is that you don't want the random popups forcing you to log in, and you don't want a bunch of JS.
 
+<h3 align="center">Mirrors</h3>
+
+* Official, [Codeberg](https://codeberg.org/ahwx/pinternet)
+
 
 <h2 align="center">Showcase:</h2>
 <p align="center">