Should provide a `docker-compose.yml` file and doc

**Is your feature request related to a problem? Please describe.**
When installing Lima as a container, it is not easy for new users to setup it to use downloaded models.

**Describe the solution you'd like**
A `docker-compose.yml` file and associated documentation should be provided to help start using the Lima container. This docker-compose would set needed volumes and environment variables such that downloading models and starting to use them would be easy.

Locate the Lima container setup and existing documentation, then review how downloaded models are stored and which environment variables the container expects. Add the requested docker-compose.yml with the needed volumes and environment variables, plus documentation that explains how to start the container and use downloaded models.

Written by the indexing model from the issue text.