Volumnes

Volumes are easier to back up or migrate than bind mounts
You can manage volumes using Docker CLI commands or the Docker API
Volumes work on both Linux and Windows containers
Volumes can be more safely shared among multiple containers
Volume drivers let you store volumes on remote hosts or cloud providers, to encrypt the contents of volumes, or to add other functionality
New volumes can have their content pre-populated by a container
Run with volumne
Delete dangling volumes

Run with volume

The volume is linked inside the container. Any external changes are visible directly inside the container.
This example breaks the immutability of the container, good for debuging, not recommended for production (Volumes should be used for data, not code)
Example

docker run -d -p 4000:80 -v $(pwd)/examples/html/:/usr/share/nginx/html:ro nginx
open http://192.168.99.102:4000

-v: Bind mount a volume (e.g., from the host: -v /host:/container, from docker: -v /container)

docker volume rm $(docker volume ls -q -f dangling=true)