Add header section background color to index.

rainfall/templates/index.html

@@ -1,4 +1,12 @@
-<!-- wp:template-part {"slug":"header","tagName":"header"} /-->
+<!-- wp:group {"backgroundColor":"light-orange"} -->
+<div class="wp-block-group has-light-orange-background-color has-background">
+	<!-- wp:template-part {"slug":"header","tagName":"header"} /-->
+
+	<!-- wp:heading {"style":{"typography":{"textTransform":"uppercase"}},"fontSize":"xx-large"} -->
+	<h2 class="has-xx-large-font-size" style="text-transform:uppercase">News</h2>
+	<!-- /wp:heading -->
+	</div>
+	<!-- /wp:group -->
 
 <!-- wp:columns -->
 <div class="wp-block-columns">