Docker and Container on ext4 FS, data of container on BTRFS file system

Hi all,
i’m new to docker.
My system FS is on ext4 but i also have a big btrfs file system
Let’s assume, i want to install a mysql docker where the container is on teh ext4 fs, but the data directory of the DB should be on btrfs.
Waht do i have to do?

Thanks an regards,

spline