add newsletter link to articles

templates/partials/newsletter-link.html.twig

@@ -0,0 +1,3 @@
+<div class="left">
+    <h2>Chcesz więcej takich treści? <a href="/newsletter?s=article-end">Zapisz się na newsletter!</a></h2>
+</div>

templates/post.html.twig

@@ -13,6 +13,9 @@
         </div>
         {{ page.content | raw }}
     </article>
+    {% if not page.header.disableNewsletter %}
+        {% include 'partials/newsletter-link.html.twig' %}
+    {% endif %}
     {% if not page.header.disableSharing %}
         {% include 'partials/share.html.twig' %}
     {% endif %}