php-cs-fixer will fix code style violations in your pull requests.
Run composer docker-up to start the containers. Then run composer test to run the tests.
When you're done testing, run composer docker-down to shut down the containers.
Run composer docker-m1 to symlink docker-compose-m1.override.yml to docker-compose.override.yml. This will reconfigure a few services in the docker compose config to be compatible with M1.