Wordpress config using composer and env

wp-config.php

<?php
// enable dotenv
require_once(__DIR__ . '/vendor/autoload.php');
(new \Dotenv\Dotenv(__DIR__.'/'))->load();

/**
 * The base configuration for WordPress.
 *
 * The wp-config.php creation script uses this file during the
 * installation. You don't have to use the web site, you can
 * copy this file to "wp-config.php" and fill in the values.
 *
 * This file contains the following configurations:
 *
 * * MySQL settings
 * * Secret keys
 * * Database table prefix
 * * ABSPATH
 *
 * @link https://codex.wordpress.org/Editing_wp-config.php
 */

// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define('DB_NAME', getenv('DB_NAME'));

/** MySQL database username */
define('DB_USER', getenv('DB_USER'));

/** MySQL database password */
define('DB_PASSWORD', getenv('DB_PASSWORD'));

/** MySQL hostname */
define('DB_HOST', getenv('DB_HOST'));

/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8mb4');

/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');

/**#@+
 * Authentication Unique Keys and Salts.
 *
 * Change these to different unique phrases!
 * You can generate these using the {@link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
 * You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
 *
 * @since 2.6.0
 */
define('AUTH_KEY',         '');
define('SECURE_AUTH_KEY',  '');
define('LOGGED_IN_KEY',    '');
define('NONCE_KEY',        '');
define('AUTH_SALT',        '');
define('SECURE_AUTH_SALT', '');
define('LOGGED_IN_SALT',   '');
define('NONCE_SALT',       '');

/**#@-*/

define( 'DISALLOW_FILE_EDIT', true );

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each
 * a unique prefix. Only numbers, letters, and underscores please!
 */
$table_prefix  = getenv('DB_PREFIX');

/**
 * Define the paths
 */
define('WP_SITEURL', getenv('WP_DOMAIN') . '/cms');
define('WP_HOME', getenv('WP_DOMAIN'));
define('WP_CONTENT_URL', getenv('WP_DOMAIN') . '/content');
define('WP_CONTENT_DIR', dirname(__FILE__) . '/content');

/*
 * For developers: WordPress debugging mode.
 *
 * Change this to true to enable the display of notices during development.
 * It is strongly recommended that plugin and theme developers use WP_DEBUG
 * in their development environments.
 *
 * For information on other constants that can be used for debugging,
 * visit the Codex.
 *
 * @link https://codex.wordpress.org/Debugging_in_WordPress
 */
define('WP_DEBUG', (strtolower(getenv('WP_DEBUG')) === 'true'));

/* That's all, stop editing! Happy blogging. */

/* Absolute path to the WordPress directory. */
if (!defined('ABSPATH')) {
    define('ABSPATH', dirname(__FILE__).'/');
}

/** Sets up WordPress vars and included files. */
require_once ABSPATH.'wp-settings.php';