A docker setup using multipass and cloudinit on MACos (but works fine with Linux as well, just check the path on the mount unit)

docker_multipass_cloudinit.yaml

#cloud-config
apt:
  sources:
    docker:
      source: "deb [arch=amd64] https://download.docker.com/linux/ubuntu $RELEASE stable"
      key: |
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package_update: true
package_upgrade: true

packages:
  - git
  - make
  - docker-ce
  - docker-ce-cli
  - containerd.io
  - nfs-common

users:
  - name: ubuntu
    group: sudo
    shell: /bin/bash
    ssh-authorized-keys:
      - <YOUR PUBLIC KEY HERE>

write_files:
  - content: |
      [Service]
      ExecStart=
      ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0:2375 --containerd=/run/containerd/containerd.sock
    owner: root:root
    permissions: '0400'
    path: /etc/systemd/system/docker.service.d/10-expose-api-port.conf

  - content: |
      [Unit]
      Description=Users Drive

      [Mount]
      What=192.168.64.1:/System/Volumes/Data/Users
      Where=/Users
      Type=nfs

      [Install]
      WantedBy=multi-user.target
    owner: root:root
    permissions: '0400'
    path: /etc/systemd/system/Users.mount

  - content: |
      [Unit]
      Description=Automount Users Drive

      [Automount]
      Where=/Users

      [Install]
      WantedBy=multi-user.target
    owner: root:root
    permissions: '0400'
    path: /etc/systemd/system/Users.automount


ntp:
  enabled: true
  ntp_client: chrony

runcmd:
  - systemctl daemon-reload
  - systemctl restart docker
  - usermod -aG docker ubuntu
  - systemctl enable Users.automount
  - systemctl start Users.automount

final_message: "The system is finally up, after $UPTIME seconds"