In order to set up a development environment, you have to have docker and docker-compose.
See https://docs.docker.com/compose/install/ for installation instructions.
Make sure you add the following to your /etc/hosts file
127.0.0.1 dev.phpdoc.org
Then, from the project root run
docker-compose up -d
The website will be available at http://dev.phpdoc.org:8000