Problem with upgrade and configuration

[visualblind]

Code:

version: "3.7"
    volumes:
      - data:/config
      - data:/cache
volumes:
  data:

For one thing you are never suppose to use the same volume for both the /config and /cache internal directories.

I believe the official recommendation is to use bind mounts for the config/cache directories. The way you're doing it now is letting Docker obfuscate that away and it sounds like there's a problem regarding the containers ability to properly read the config files (most likely since you're using a single volume for both /config and /cache) since you stated your instance looses that information upon upgrading.

If you are hell-bent on using docker volumes instead of bind mounts, then use a different volume for each path:

Code:

    volumes:
      - config:/config
      - cache:/cache
volumes:
  config:
  cache:

My recommendation is to read the docs completely, then start over from scratch.