Portainer Stack Persistent Storage

Hi, yes I have. The stack and env provided above is a direct result of this. There are a number of env variables in the stack that are not in the git files, where it lists
‘Allow passing in these variables via .env:’
Can I assume they go to defaults in the container or do all need to be assigned? Perhaps I missed something??
As stated the docker pull option seemed to work, the Portainer Stack template I used came from here zammad-docker-compose