Caddy IPNS mount server custom 404 page and response code for other situations

Caddyfile

{
        auto_https disable_redirects
}

(upgrade) {
    @upgradable {
        header Upgrade-Insecure-Requests 1
        protocol http
    }

    redir @upgradable https://{host}{uri} 308

}

# replace :1111 with whatever host ur using

:1111 {

        import upgrade

        root  * /ipns/{host}
        file_server {
                index index.html 
        } 
 
        handle_errors { 
                @404 expression {http.error.status_code} == 404 
                handle @404 { 
                        rewrite * /404.html 
                        file_server 
                        
                        # 404 file doesn't exist
                        @no not file /404.html
                        respond @no "{http.error.status_code} {http.error.status_text}"
                }

                @other expression {http.error.status_code} != 404
                handle @other {
                        respond "{http.error.status_code} {http.error.status_text}"
                }
        }
}