how to expose a volume?

[EntityinArray]

no information about how to expose ftp share in a volume
provide an example please

[xrodriguezd]

docker create volume ftp_server_data

docker run -d
--name ftp
-p "21:21"
-p 21000-21010:21000-21010
-v "/etc/letsencrypt:/etc/letsencrypt:ro"
-v "ftp_server_data:/home/one"
-e USERS="one|1234|/home/one"
-e ADDRESS=ftp.site.domain
-e TLS_CERT="/etc/letsencrypt/live/ftp.site.domain/fullchain.pem"
-e TLS_KEY="/etc/letsencrypt/live/ftp.site.domain/privkey.pem"
delfer/alpine-ftp-server