wp-config.php

<?php

require __DIR__ . '/../phpdotenv/src/Dotenv.php';
require __DIR__ . '/../phpdotenv/src/Loader.php';
require __DIR__ . '/../phpdotenv/src/Validator.php';

$dotenv = new Dotenv\Dotenv( dirname( __DIR__ ) );
$dotenv->load();
$dotenv->required( array( 'DB_NAME', 'DB_USER', 'DB_PASSWORD', 'DB_HOST', 'WP_ENV', 'WP_HOME', 'WP_SITEURL' ) );


// ** MySQL settings ** //
/** The name of the database for WordPress */
define( 'DB_NAME', $_ENV['DB_NAME'] );

/** MySQL database username */
define( 'DB_USER', $_ENV['DB_USER'] );

/** MySQL database password */
define( 'DB_PASSWORD', $_ENV['DB_PASSWORD'] );

/** MySQL hostname */
define( 'DB_HOST', $_ENV['DB_HOST'] );

/** Database Charset to use in creating database tables. */
define( 'DB_CHARSET', 'utf8' );

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

define('AUTH_KEY',         $_ENV['AUTH_KEY'] );
define('SECURE_AUTH_KEY',  $_ENV['SECURE_AUTH_KEY'] );
define('LOGGED_IN_KEY',    $_ENV['LOGGED_IN_KEY'] );
define('NONCE_KEY',        $_ENV['NONCE_KEY'] );
define('AUTH_SALT',        $_ENV['AUTH_SALT'] );
define('SECURE_AUTH_SALT', $_ENV['SECURE_AUTH_SALT'] );
define('LOGGED_IN_SALT',   $_ENV['LOGGED_IN_SALT'] );
define('NONCE_SALT',       $_ENV['NONCE_SALT'] );

$table_prefix = 'wp_';

define( 'WP_CONTENT_DIR', dirname( __FILE__ ) . '/app' );
define( 'WP_CONTENT_URL', 'http://' . $_ENV['WP_HOME'] . '/app' );
define( 'WPMU_PLUGIN_DIR', dirname( __FILE__ ) . '/app/mu-plugins' );
define( 'WPMU_PLUGIN_URL', 'http://' . $_ENV['WP_HOME'] . '/app/mu-plugins' );

define( 'WP_HOME', $_ENV['WP_HOME'] );
define( 'WP_SITEURL', $_ENV['WP_SITEURL'] );

define('WP_DEFAULT_THEME', 'sage');

/* 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' );