To prepare to test the next release of Drupal 9 and Drupal 10, I upgraded the website/blog to the latest version of Drupal core 9.4.x. This is a minor version (feature release) of Drupal 9, and from Drupal 9.4.x it will be Olivero as the default theme and Claro as the maintenance theme.
About server:
- PHP 8.1 alternative for PHP7.4
- MariaDB 10.3.x alternative for MySQL 8: I decided to alternative MySQL 8 with MariaDB because using MySQL 8, the server is very slow when inserting and updating.