add docker-compose-plugin

mx-linux/mx-21-docker.sh

@@ -12,6 +12,8 @@ sudo update-rc.d docker enable
 sudo usermod -aG docker $USER
 # newgrp $USER
 sudo apt install -y docker-compose
+# install compose V2
+sudo apt install -y docker-compose-plugin
 # portainer in swarm mode
 ip=$(hostname -I | awk '{print $1}')
 sudo docker swarm init --advertise-addr $ip