Create header for the home page

assets/css/index.css

+.main-header {
+    height: 768px;
+    position: relative;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+
+    img {
+        &:first-child {
+            width: 100%;
+            height: 100%;
+            object-fit: cover;
+        }
+
+        &:last-child {
+            --size: 710px;
+
+            position: absolute;
+            width: var(--size);
+            height: var(--size);
+        }
+    }
+}
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index.php

@@ -14,5 +14,10 @@
 <?php
 include_once 'assets/php/navbar.php';
 ?>
+
+<header class="main-header">
+  <img src="/assets/img/meat.png" alt="De la viande" aria-hidden="true"/>
+  <img src="/assets/img/logo_main.svg" alt=""/>
+</header>
 </body>
 </html>
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