chore: Get Docker Compose Working

[johnnyhuy]

Reading through the docs in the Docker Compose section requires some environment variables to work out of the box.

I've based these values on the .env.sample dotfile. We can also use the env_file field on the Compose file if we prefer not to duplicate these values.

Tested on:

• Docker Compose version v2.23.0-desktop.1
• Docker Desktop 4.25.2 (129061)
• macOS 14.2.1 (23C71)

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[jackkav]

Thanks @johnnyhuy !