add some more docs for facerecognition

Signed-off-by: Simon L <szaimen@e.mail.de>

community-containers/facerecognition/readme.md

@@ -3,6 +3,24 @@ This container bundles the external model of facerecognition and auto-configures
 
 ### Notes
 - This container needs imaginary in order to analyze modern file format images. Make sure to enable imaginary in the AIO interface before adding this container.
+- Facerecognition is by default disabled for all users, if you want to enable facerecognition for all users, you can run the following before adding this container:
+    ```bash
+    # Go into the container
+    sudo docker exec --user www-data -it nextcloud-aio-nextcloud bash
+    ```
+    Now inside the container:
+    ```bash
+    NC_USERS_NEW=$(php occ user:list | sed 's|^  - ||g' | sed 's|:.*||')
+    mapfile -t NC_USERS_NEW <<< "$NC_USERS_NEW"
+    for user in "${NC_USERS_NEW[@]}"
+    do
+        php occ user:setting "$user" facerecognition full_image_scan_done false
+        php occ user:setting "$user" facerecognition enabled true
+    done
+
+    # Exit the container shell
+    exit
+    ```
 - If facerecognition shall analyze shared files & folders (`sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ config:app:set facerecognition handle_shared_files --value true`), groupfolders (`sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ config:app:set facerecognition handle_group_files --value true`) and/or external storages (`sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ config:app:set facerecognition handle_external_files --value true`) in Nextcloud, you need to enable support for it manually first by running the mentioned commands before adding this container. See https://github.com/matiasdelellis/facerecognition/wiki/Settings#hidden-settings for further notes on each of these settings.
 - See https://github.com/nextcloud/all-in-one/tree/main/community-containers#community-containers how to add it to the AIO stack