Issue #2952309 by daniel_rose, volkswagenchick, BarisW: Implementing a help page

<?php

/**

 * @file

 * Adds a solution to get production files on a development server on demand.

 */

use Drupal\Core\Routing\RouteMatchInterface;

/**

 * Implements hook_help().

 */

function stage_file_proxy_help($route_name, RouteMatchInterface $route_match) {

 switch ($route_name) {

   case 'help.page.stage_file_proxy':

     $output = '';

     $output .= '<p>' . t("Stage File Proxy is a general solution for getting production files on a development server on demand. It saves you time and disk space by sending requests to your development environment's files directory to the production environment and making a copy of the production file in your development site. You should not need to enable this module in production.") . '</p>';

     $output .= '<p>' . t('See the <a href=":project_page">project page on Drupal.org</a> for more details.', [

       ':project_page' => 'https://www.drupal.org/project/stage_file_proxy',

     ]) . '</p>';

     return $output;

   }

}