After downloading the project execute
composer install
cp .env.example .envConfigure the .env file setting the proper values for database, user and password. Then execute these commands
php artisan key:generate
php artisan migrate:install
php artisan migrateIf your DSS database already had some tables from a previous project, you can delete them using Adminer and execute the migrations again. Alternatively, you can execute this command
php artisan migrate:freshIf you have dependency errors when initializing the project, execute this command
composer update