Separated laravel app to its own folder (#540)

api/app/Mail/UserInvitationEmail.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Mail;
+
+use App\Models\UserInvite;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class UserInvitationEmail extends Mailable implements ShouldQueue
+{
+    use Queueable;
+    use SerializesModels;
+
+
+    /**
+     * Create a new message instance.
+     *
+     * @param string $workspaceName
+     * @return void
+     */
+    public function __construct(public UserInvite $invite)
+    {
+    }
+
+    /**
+     * Build the message.
+     *
+     * @return $this
+     */
+    public function build()
+    {
+        $workspaceName = $this->invite->workspace->name;
+        return $this
+            ->markdown('mail.user.invitation', [
+                'workspaceName' => $workspaceName,
+                'inviteLink' => $this->invite->getLink(),
+            ])->subject('You are invited to join ' . $workspaceName . ' on OpnForm');
+    }
+}