composer require magento/magento2ce

composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition

php bin/magento sampledata:deploy
php bin/magento setup:upgrade

composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition .

php bin/magento setup:install
--base-url="http://yoururl.com/"
--db-host="localhost"
--db-name="dbname"
--db-user="dbuser"
--db-password="dbpass"
--admin-firstname="admin"
--admin-lastname="admin"
--admin-email="user@example.com"
--admin-user="admin"
--admin-password="admin123"
--language="en_US"
--currency="USD"
--timezone="America/Chicago"
--use-rewrites="1"
--backend-frontname="admin"