Drupal 8 Local Settings for using with Pantheon based D8 site

settings.local.php

<?php

/**
 * @file
 * Local development override configuration feature.
 *
 * To activate this feature, copy and rename it such that its path plus
 * filename is 'sites/default/settings.local.php'. Then, go to the bottom of
 * 'sites/default/settings.php' and uncomment the commented lines that mention
 * 'settings.local.php'.
 *
 * If you are using a site name in the path, such as 'sites/example.com', copy
 * this file to 'sites/example.com/settings.local.php', and uncomment the lines
 * at the bottom of 'sites/example.com/settings.php'.
 */

// DB connection to localhost
$databases['default']['default'] = array(
   'driver' => 'mysql',
   'database' => 'bakers',
   'username' => 'root',
   'password' => '',
   'host' => 'localhost',
   'prefix' => '',
 );

if (isset($_ENV['PANTHEON_ENVIRONMENT'])) {
  $settings['hash_salt'] = $_ENV['DRUPAL_HASH_SALT'];
}

$settings['file_private_path'] = 'sites/default/files/private';

// Check to see if we are serving an installer page.
$is_installer_url = (strpos($_SERVER['SCRIPT_NAME'], '/core/install.php') === 0);


/**
 * Add the Drupal 8 CMI Directory Information directly in settings.php to make sure
 * Drupal knows all about that.
 *
 * Issue: https://github.com/pantheon-systems/drops-8/issues/2
 *
 * IMPORTANT SECURITY NOTE:  The configuration paths set up
 * below are secure when running your site on Pantheon.  If you
 * migrate your site to another environment on the public internet,
 * you should relocate these locations. See "After Installation"
 * at https://www.drupal.org/node/2431247
 *
 */
if ($is_installer_url) {
  $config_directories = array(
    CONFIG_SYNC_DIRECTORY => 'sites/default/files',
  );
}
else {
  $config_directories = array(
    CONFIG_SYNC_DIRECTORY => 'sites/default/config',
  );
}