Building on the already existing work with mediawiki-quickstart, create a local instance of Wikilambda that could be spun up using this mediawiki-quickstart as well.
A couple of helpful guides:
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/WikiLambda/+/refs/heads/master/README.md#development-instructions
https://meta.wikimedia.org/wiki/Abstract_Wikipedia/Abstract_developer_cheatsheet