add chapter about data repositories, and start work on perfomance chapter

implementation/15-adding-content/config/settings.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types=1);
+
+use Lubian\NoFramework\Settings;
+
+return new Settings(
+    environment: 'prod',
+    dependenciesFile: __DIR__ . '/dependencies.php',
+    middlewaresFile: __DIR__ . '/middlewares.php',
+    templateDir: __DIR__ . '/../templates',
+    templateExtension: '.html',
+    pagesPath: __DIR__ . '/../data/pages/',
+    connection: [
+        'driver' => 'pdo_sqlite',
+        'user' => '',
+        'password' => '',
+        'path' => __DIR__ . '/../data/db.sqlite',
+    ],
+    doctrine: [
+        'devMode' => true,
+        'metadataDirs' => [__DIR__ . '/../src/Model/'],
+        'cacheDir' => __DIR__ . '/../data/cache/',
+    ],
+);