Try out EE - comming from CE

we are using (for ages) the following docker-compose.

version: '2'
services:
  gitlab:
    image: gitlab/gitlab-ce:latest
    volumes:
      - "/srv/gitlab/data:/var/opt/gitlab"
      - "/srv/gitlab/config:/etc/gitlab"
      - "/srv/gitlab/logs:/var/log/gitlab"
      - "/gitlab_backup/git_backups:/var/opt/gitlab/backups"
    ports:
      - "80:80"
      - "22:22"
      - "443:443"
    restart: always
    hostname: gitlab.krone.at

what is the correct, data-loss free, way to test out EE - i'd like to run the trial, to convince mgmt to buy licensces.

just changing image to gitlab-ee - will this migrate my data? can we then stay on ee - even if lic. is expired? running in kinda "ce" mode (missing ee features)?