Packer provisioners don't save installed packages - image

Question

I have encountered an issue during provisioning with HashiCorp Packer for virtualbox-iso on Alpine Linux v3.16.
Provisioning script runs OK, and it logs that build has finished, however when I open the outputted ovf file in VirtualBox moved files and docker are not present.
I would be grateful for any advice.
I run packer build packer-virtualbox-alpine-governator.json
packer-virtualbox-alpine-governator.json file:
{
"variables": {
"password": "packer"
},
"builders": [
{
"type": "virtualbox-iso",
"memory": 8192,
"guest_os_type": "Other_64",
"iso_url": "https://dl-cdn.alpinelinux.org/alpine/v3.16/releases/x86_64/alpine-standard-3.16.0-x86_64.iso",
"iso_checksum": "file:https://dl-cdn.alpinelinux.org/alpine/v3.16/releases/x86_64/alpine-standard-3.16.0-x86_64.iso.sha256",
"ssh_username": "root",
"ssh_password": "{{user `password`}}",
"shutdown_command": "poweroff",
"hard_drive_interface": "sata",
"boot_command": [
"root<enter><wait>",
"setup-alpine<enter><wait>us<enter><wait>us<enter><wait><enter><wait><enter><wait><enter><wait><enter><wait5>{{user `password`}}<enter><wait>{{user `password`}}<enter><wait><enter><wait><enter><wait><enter><wait15><enter><wait>openssh<enter><wait>openssh-full<enter><wait5>test123<enter><wait5>test123<enter><wait><enter><wait><enter><wait>sda<enter><wait>sys<enter><wait>y<enter><wait30>",
"echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config<enter><wait>",
"/etc/init.d/sshd restart<enter><wait5>"
]
}
],
"provisioners": [
{
"type": "shell",
"inline": ["mkdir -p /opt/site/governator"]
},
{
"type": "file",
"source": "files/docker-compose.yaml",
"destination": "/opt/site/"
},
{
"type": "file",
"source": "files/governator.conf",
"destination": "/opt/site/governator/"
},
{
"type": "shell",
"scripts": [
"scripts/alpine/install-docker-on-alpine.sh"
]
}
]
}
./scritps/alpine/install-docker-on-alpine.sh
#! /bin/ash
cat > /etc/apk/repositories << EOF; $(echo)
https://dl-cdn.alpinelinux.org/alpine/v$(cut -d'.' -f1,2 /etc/alpine-release)/main/
https://dl-cdn.alpinelinux.org/alpine/v$(cut -d'.' -f1,2 /etc/alpine-release)/community/
https://dl-cdn.alpinelinux.org/alpine/edge/testing/
EOF
apk update
apk add docker
addgroup $USER docker
rc-update add docker boot
service docker start
apk add docker-compose
sync