Docker Elasticsearch issue fix

[Snify89]

I have seen many issues regarding elasticsearch and docker.
This is mostly not because of ragflow.

The elasticsearch container/image uses data from this path:
/usr/share/elasticsearch/data

In the docker compose file, this path is by default handled with it's docker volume (driver: local)
By default, this path is owned by the user id 1000 (look for elasticsearch documentation, to change user/group id).

I wanted to remove the volume and change the path (docker host mount).

Some users might do the same or the "driver: local" (on different OSes) has some issues with elasticsearch.

This might lead to some issues and elasticsearch does not boot up.
Before starting the container, I made a esdata01 folder, gave it 777 permission (I don't mind it) and mount host this path to the elasticsearch container.

This shows, that elasticsearch might not start, due to permission/user/group issues/mistakes/consfusion.

This should be added to the FAQ

[JinHai-CN]

@writinwaters