DONE: layout letter with letterhead and footer, notification for newly...

app/Notifications/Concerns/BuildsMailMessage.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Notifications\Concerns;
+
+use Illuminate\Notifications\Messages\MailMessage;
+
+trait BuildsMailMessage
+{
+    protected function mailMessage(string $subject, string $view, array $data = []): MailMessage
+    {
+        return (new MailMessage)
+            ->subject($subject)
+            ->markdown($view, array_merge([
+                'logoPath' => config('mail.logo_path'),
+            ], $data));
+    }
+}