This thread is related - https://meta.discourse.org/t/keeping-discourse-docker-updated-need-to-manually-git-pull/15290
I had edited the launcher script so I had to delete it before ‘git pull’ worked. And I then ran destroy/bootstrap/start and all is well again.
If there is an update to the launcher script or another reason to run ‘git pull’ before updating the docker_manager let me know and I will test if the Docker Manager prompts me to run ‘git pull’ before updating. (edit - or should running ‘git pull’ before updating docker_manager be part of the documentation?)