We've developed this internally at Twitter. I'm sure some of the tribal knowledge would be useful externally. We dump about 600 lines of PHP into a PhabricatorAuthManagementDockerInstallWorkflow and then execute it with /phabricator/bin/auth docker-install once the containers are running.

This class runs through the following:

• Creates an admin user with a default password based on an environment variable
• Auto-enables the username/password auth provider.
• Creates almanac devices/interfaces/networks/services for a minimal cluster setup (Daemons, php-fpm, drydock, keywarden)
• Generates a shared SSH key for cluster security, automatically installing them and trusting them. This is distributed using shared docker volumes between the services.
• Mirrors a git repo on our internal SCM.

We don't have Drydock working yet, but this enables us to get most of our development done relatively painlessly.

This is related to or possibly a duplicate of T15011

https://github.com/willson556/phorge-devcontainer

Also interesting: https://github.com/phabricator-docker/phabricator by @tsc (Thanks!)

Edited: https://github.com/datenknoten/docker-phorge/