This file handles 404 errors in GitHub Pages. The file extension must be ".html".
The currently used redirection of iterami repos to a central 404 page uses this code:<!doctype html>
<html lang=en>
<meta charset=utf-8>
<meta content="0; url=/404/?REPO" http-equiv=refresh>
<title>404</title>
<link href=path/to/common/css/writings.css rel=stylesheet>
<a href=/404/?REPO>404</a>