I thought it was a good idea, because the current version of DatabaseCleaner requires you to have Postgres, MySQL, Redis, and Mongo up and running before you run
Here are the steps:
Download the Docker Toolbox, a 176+ MB package.
Install the package, which will expand to 400+ MB in your filesystem.
In the terminal:
docker-machine start default
Then within your project:
docker-compose up(before this I had to run
eval "$(docker-machine env default)"because of this issue). Get ready to wait for a few minutes while it sets up your virtual machine.
docker-compose run --rm gem