docs: add Config caching code as comments

Author: kenjis

public/index.php

@@ -48,6 +48,11 @@
     define('ENVIRONMENT', env('CI_ENVIRONMENT', 'production'));
 }
 
+// Load Config Cache
+// $factoriesCache = new \CodeIgniter\Cache\FactoriesCache();
+// $factoriesCache->load('config');
+// ^^^ Uncomment these lines if you want to use Config Caching.
+
 /*
  * ---------------------------------------------------------------
  * GRAB OUR CODEIGNITER INSTANCE
@@ -73,6 +78,10 @@
 
 $app->run();
 
+// Save Config Cache
+// $factoriesCache->save('config');
+// ^^^ Uncomment this line if you want to use Config Caching.
+
 // Exits the application, setting the exit code for CLI-based applications
 // that might be watching.
 exit(EXIT_SUCCESS);