database.config.php

<?php
$CONFIG = array (
  'dbtype' => getenv('DB_TYPE'),
  'dbname' => getenv('DB_NAME'),
  'dbhost' => getenv('DB_HOST'),
  'dbport' => getenv('DB_PORT'),
  'dbtableprefix' => getenv('DB_TABLE_PREFIX'),
  'mysql.utf8mb4' => getenv('MYSQL_UTF8MB4'),
  'dbuser' => getenv('DB_USER'),
  'dbpassword' => getenv('DB_PASSWORD'),
);