Objectbox Sync with Fly.io

Question

I would like apply objectbox sync to fly.io. In testing in local, it is fine with the docker command. But in deploying to fly.io, I have no opinion with how to work -model command in fly.io.

docker run --rm -it \
    --volume "$(pwd):/data" \
    --publish 127.0.0.1:9999:9999 \
    --publish 127.0.0.1:9980:9980 \
    --user $UID \
    objectboxio/sync:sync-server-2022-10-21 \
    --model /data/objectbox-model.json \
    --unsecured-no-authentication \
    --admin-bind 0.0.0.0:9980