Clean-Up

Stop and Remove the Container

# Stop containers alpine1 and alpine2
docker stop alpine1 alpine2

# Remove containers alpine1 and alpine2
docker rm alpine1 alpine2

Delete Custom Bridge

# Remove custom_bridge network
docker network rm custom_bridge

Verify Network List

root@ubuntu:/home/ubuntu# docker network ls
NETWORK ID     NAME      DRIVER    SCOPE
2eabde4e866c   bridge    bridge    local
e9f54b21c605   host      host      local
e9708605179a   none      null      local

Stop Ubuntu Server

# Stop Ubuntu server
multipass stop ubuntu