chore: sync project files to match upstream templates (#4537)

- updated some files to match the official CodeIgniter 4 skeleton.
- rebuilt package.json from a clean init and modernized metadata and formatting
- rebuilt composer.json with modernized metadata and formatting
- replaced code of conduct text with markdown
- updated Dockerfile to replace deprecated instruction

app/Controllers/BaseController.php

@@ -28,12 +28,9 @@ abstract class BaseController extends Controller
     // protected $session;
 
     /**
-     * @param RequestInterface $request
-     * @param ResponseInterface $response
-     * @param LoggerInterface $logger
      * @return void
      */
-    public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger): void
+    public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
     {
         // Load here all helpers you want to be available in your controllers that extend BaseController.
         // Caution: Do not put the this below the parent::initController() call below.