Download MariaDb image
docker pull mariadb
Run Mariadb container with environment variables
docker run --name [nameContainer] -e MARIADB_USER=[user] -e MARIADB_PASSWORD=[password] -e MARIADB_ROOT_PASSWORD=[passwordRoot] -e MARIADB_DATABASE=[nameDB] -p 3306:3306 -d mariadb
Access the container
docker exec -it [nameContainer] bash
Access the Mariadb in Container
mariadb -u [user] -p
psql -U [user] --password --db [nameDB]