First steps

WordPress installation

When you first access your website, you'll be redirected to the WordPress installation page.

Enter your desired credentials to access the dashboard.

Create a child theme

In your terminal, initialize your child theme:

mkdir wp/content/themes/mychildtheme
touch wp/content/themes/mychildtheme/style.css
touch wp/content/themes/mychildtheme/functions.php

Then open style.css and fill it with this header, modify to your needs:

/*
 Theme Name:   My Child Theme
 Description:  Theme for my Sword app
 Author:       John Doe
 Author URI:   http://example.com
 Template:     twentytwentytwo
 Version:      1.0.0
 License:      GNU General Public License v2 or later
 License URI:  http://www.gnu.org/licenses/gpl-2.0.html
 Text Domain:  mychildtheme
*/

IMPORTANT

Make sure the text domain is the same as the one in /config/packages/sword.yaml

sword:
    child_theme_translation_domain: 'mychildtheme'

Next thing to do is to connect your child theme to Symfony. Open functions.php and fill it with this content:

<?php

declare(strict_types=1);

use function Sword\SwordBundle\Helper\initialize_services;

initialize_services();

Finally, go activate it in WordPress admin.

That's it. Your child theme is Symfony ready.