friendica/static/env.config.php

<?php
/**
 * @copyright Copyright (C) 2020, Friendica
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * Main mapping table of environment variables to namespaced config values
 *
 */

return [
	'MYSQL_HOST' => ['database', 'hostname'],
	'MYSQL_USERNAME' => ['database', 'username'],
	'MYSQL_USER' => ['database', 'username'],
	'MYSQL_PORT' => ['database', 'port'],
	'MYSQL_PASSWORD' => ['database', 'password'],
	'MYSQL_DATABASE' => ['database', 'database'],
];