Add initial Code

app/Models/Setting.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Setting extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'invoice_number_format',
+        'invoice_number_start',
+    ];
+}