External Apps download directly to the docker image, not host storage (Docker on Unraid)

[farhills]

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Steps to reproduce

1. Configure and test the Daemon
2. Run the test deployment
3. Install an external App (STT Whisper 2)
4. Data for both the test deployment as well as the installed app is saved to the docker image /volumes dir, eventually exceeding the docker image size limit.

Expected behaviour

There should be a host path env variable for downloaded data to be saved to the host storage outside the docker image. Or if this already exists, could you update the docs to include the container path where downloaded external app data will be saved so that we can map it appropriately?

Actual behaviour

Docker size limit is exceeded, causing the app install to fail.

Server configuration

Web server: Nginx

Database: Maria 10.11

PHP version: 8.3

Nextcloud version: 29.0.4

Operating system: Docker / Unraid 6.12.13