cops/rootfs/etc/confd/templates/config_local.php.tmpl

<?php
    if (!isset($config))
        $config = array();

    $config['calibre_directory'] = '/var/lib/cops/calibre/';
    $config['calibre_internal_directory'] = '/calibre/';

    $config['cops_x_accel_redirect'] = "X-Accel-Redirect";

    $config['cops_title_default'] = "{{ getenv "TITLE" "COPS" }}";

    $config['cops_use_url_rewriting'] = "1";
    $config['cops_update_epub-metadata'] = "1";