edlp_d8/web/modules/custom/edlp_corpus/includes/edlp_corpus_articlesindex.inc

<?php

// use Drupal\Core\Url;

function template_preprocess_edlp_corpus_articlesindex(&$vars){
  // dpm($vars);
  /*
  @see https://www.drupal8.ovh/index.php/en/tutoriels/339/render-a-node-or-an-entity
  */
  $view_builder = \Drupal::entityTypeManager()->getViewBuilder('node');

  if(count($vars['articles_nodes'])){
    $articles_list = array (
      '#theme' => 'item_list',
      '#items' => [],
    );
    foreach($vars['articles_nodes'] as $node){
      $articles_list['#items'][] = $view_builder->view($node, 'index');
    }

    $vars['articles'] = array(
      "#type"=>"container",
      "#attributes"=>array(
        "class"=>['articles']
      ),
      "#markup"=>"<h3>".t("Articles")."</h3>",
      "articles"=>$articles_list
    );
  }
}