Hello Fernando,
cnce you have installed the Docker, you must copy the files/folders manually. There is no control process.
It is important to exercise caution to avoid overwriting important files or damaging the system. It is also recommended to create regular backups of important data to avoid data loss.
The backup and restore should not have any overall effect on the wiki as it is for safeguarding the wiki in case something goes wrong during the container restart or wiki update. The images should also be preserved as they are then restored after the backup as you can see from the “restore-wiki-data.sh” script
In addition if you read the README.md, you can configure the number of backups you want in the .env file, however the minimum number is right now set to 5
I think you are getting confused with docker image builder files that is used to build the bluespice image. So basically what you are seeing is not the actual path in the bluespice image.
Anyways, you can ignore the above and if you want to see the backup dir in bluespice image, it exists at /data/backups in the docker image. Assuming that you have updated the docker image to the latest bluespice version (which I recommend), then the backups should happend only when a fresh container is created. This behaviour is to ensure a fresh wiki is installed whenever a new docker container is created either by docker compose up -d or by docker run .... And I would suggest you not to keep the WIKI_BACKUP_DIR env var too high as it will eat up a lots of space.