Add initial Code

database/seeders/SettingsTableSeeder.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Seeder;
+use App\Models\Setting;
+
+class SettingsTableSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+        Setting::firstOrCreate([], [
+            'invoice_number_format' => 'RE-{number}',
+            'invoice_number_start' => 1,
+        ]);
+    }
+}