Upgrade WordPress to 6.4.3

Upgrade to Alpine Linux 3.19 and PHP8.3

Make sure the wp-secrets.php file is generated once and persisted (#50)

Update WordPress to 6.4.2 (#47)

* Update Dockerfile to WordPress 6.4.2

* Update WP version in README to 6.4.2

Upgrade WordPress to 6.4.1 (#46)

Make sure to cast string boolean values to actual booleans

Upgrade WordPress to 6.3.1

Update WordPress to 6.2.2

Upgrade Alpine Linux to 3.18, Nginx to 1.24, PHP to 8.1

Merge pull request #39 from maxdaniel98/master

Update Wordpress to 6.1.1