First of all, please install a theme, you can use the Magento luma one: (By default luma is installed, remove it first)
"magento/theme-frontend-luma": "*"
Then install an elasticsearch package if you want to: (By default v7 is installed, remove it first)
"magento/module-elasticsearch-6": "*",
"magento/module-elasticsearch-7": "*",
You can now install the Magento software:
magento setup:install --base-url=http://opengent-cms.local.com/
--db-host=localhost --db-name=opengento_base --db-user=root
--admin-firstname=Magento --admin-lastname=User --admin-email=admin@example.com
--admin-user=admin --admin-password=admin123 --language=en_US
--currency=USD --timezone=America/Chicago --cleanup-database
--sales-order-increment-prefix="ORD$" --session-save=db --use-rewrites=1
--search-engine=elasticsearch7 --elasticsearch-host=localhost
--elasticsearch-port=9200
Install advanced cookie management: "magento/module-cookie": "*",