prepare subscription page

site/templates/newsletter.php

@@ -0,0 +1,19 @@
+<?php snippet('header') ?>
+<main id="<?= $page->template() ?>">
+  <article>
+    <?php snippet('cover', array('isOpen' => true), slots: true) ?>
+      <?php slot('title') ?>
+      <h2 class="main-title <?= setTitleFontSizeClass($page->title()) ?>"><?= $page->title() ?></h2>
+      <?= $page->body() ?>
+      <form id="subscribe-form">
+        <label for="email">
+          <input type="email" name="email" id="email" placeholder="votre e-mail">
+          <button type="submit" onclick="subscribe(event)">→</button>
+        </label>
+      </form>
+      <?php endslot() ?>
+    <?php endsnippet() ?>
+  </article>
+</main>
+
+<?php snippet('footer') ?>