...
👉 This guide assumes that you already have a WordPress multisite project set up on live and are looking to create a local development environment for it.
If you need to set up a new WordPress multisite project, you can follow the WordPress Codex guide.
Prerequisites
DDEV installed on your local machine
Drush (Optional, for Pantheon integration), to get it, run
ddev composer require drush/drush
Ability to endure pain if things go wrong 😅 (believe me they will)
...