Openproject community 13 All-in-one container - migrate from docker to new docker

Question

I have executed the following command to setup an open project community 13 from the docker for a month.

docker run -it -p 8080:80 -e OPENPROJECT_SECRET_KEY_BASE=secret -e OPENPROJECT_HOST__NAME=localhost:8080 -e OPENPROJECT_HTTPS=false -e OPENPROJECT_DEFAULT__LANGUAGE=en openproject/community:13

Then I would like to migrate the environment to the new docker under the new machine.

I have tried the following step from the new machine.

Step 1. ( save from old machine )

docker save -o openproject.tar

The tar file can be saved from old machine.

docker load -i openproject.tar

The image can be restored on the new machine.

Step 2.

docker run -it -p 8080:80 -e OPENPROJECT_SECRET_KEY_BASE=secret -e OPENPROJECT_HOST__NAME=localhost:8080 -e OPENPROJECT_HTTPS=false -e OPENPROJECT_DEFAULT__LANGUAGE=en openproject/community:13

The new open project community 13 with docker container is built from new machine and can be browsed, but old data cannot be restored.

I have tried to export the backup sql from the ( old docker environment ) open project - administration by web.

The owner of openproject db under debian - postgresql is unknown.

Is there any idea about the migration / restore ?