how to create FTP server in namespace

Lets say i created two namespace in Ubuntu.

ip netns add A

ip netns add B

now create Macvlan corresponding to each namespaces

ip link add macvlanA link wlo1 type macvlan mode bridge

ip link set macvlanA netns A

ip netns exec A ifconfig macvlanA 10.0.0.1

and done the same with namespace B with ip

10.0.0.2

I want to transfer files from one namespace to another using FTP server. how can i do that?