ok I’ve found something that ~works !

	server {
		listen 443 ssl;
		server_name _;
		ssl_certificate /etc/nginx/ssl/catchall.crt;
		ssl_certificate_key /etc/nginx/ssl/catchall.key;

		error_page 404 /404.html; #at /var/www/html/

		location /404.html {internal;}

		return 404;
	}

so i get the default 404 html from nginx. but not the one that I specified error_page 404 /404.html; any ideas ?