Add repo hygiene rules and ignore secrets

server/tests/Unit/MultiplierTest.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit;
+
+use App\Module\Economy\Service\EconomyService;
+use PHPUnit\Framework\TestCase;
+
+final class MultiplierTest extends TestCase
+{
+    public function testMultiplierChain(): void
+    {
+        $result = EconomyService::multiplyBonuses([0.10, -0.15, 0.10, 0.02]);
+        self::assertEquals(1.04907, $result, '', 0.0001);
+    }
+}