Generate a new block for related posts

References #3

web/modules/custom/blog/src/Plugin/Block/RelatedPostsBlock.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Drupal\opdavies_blog\Plugin\Block;
+
+use Drupal\Core\Block\BlockBase;
+
+/**
+ * @Block(
+ *   id = "opdavies_blog_related_posts",
+ *   admin_label = @Translation("Related Posts"),
+ *   category = @Translation("Blog")
+ * )
+ */
+class RelatedPostsBlock extends BlockBase {
+
+  public function build(): array {
+    $build['content'] = [
+      '#markup' => $this->t('It works!'),
+    ];
+
+    return $build;
+  }
+
+}