I restarted but now I have blank dashboard

If you're looking for what docker volumes were used, that's in the docker compose file:
https://github.com/allegroai/clearml-server/blob/master/docker/docker-compose.yml

do you know if I can restore the same container?

As far as I know, you can start a docker container with the same version and the same volumes and you should be able to just continue.

I guess that the container was destroyed with the data. is there any auto backup? mapping for local storage?

Happy to help :)

Is this after you've started the clearML server that you can't find the experiments?

I updated the docker-compose and it fixed, thanks