[TM-387] Fix creation date for docker images

Problem: nix caches image metadata, so the image creation date is not updated on image rebuild

A new docker image was uploaded today: https://gitlab.com/morley-framework/morley/-/jobs/388997021, but the creation date in the image is set to yesterday: https://gitlab.com/morley-framework/morley/container_registry

Solution: pass date as a parameter from CI