This is an image simply includes laravel installer binary. By using docker container to initialise the laravel application, you don't have to manage your local PHP version and environment.
Mount the directory you prefer to initialise a new Laravel project, and run the following command by replacing MY_REPO with your project name.
docker run --rm -it \
--volume $PWD:/app \
--volume ~/.composer-docker/cache:/tmp/cache \
chcjonathanguo/laravel-installer:latest new MY_REPO