It's recommended that you use Composer to install slim3-doctrine.
$ composer require siworks/slim3-doctrine "dev-master"
OR
Clone the repository and access the directory:
$ git clone git@github.com:siworksit/slim3-doctrine.git && cd slim3-doctrine
Execute composer command with:
$ docker-compose run --rm composer
Execute PHPUnit with:
$ docker-compose run --rm phpunit
OR
$ ./vendor/bin/phpunit --coverage-html coverage