Persistence Storage using AWS EFS

Hi Team,
I have setup NodeRed on AWS on my test environment.
Below are my architecture details :

  1. I am using ECS fargate to host the docker image.
  2. I have configured the persistent storage using EFS.
  3. Dockerfile consists this :
    FROM nodered/node-red:latest
  4. Deployment is done through Azure Devops pipeline using Terraform scripts.

I was facing some issues with permissions while implementing persistent storage on EFS, which I fixed by using following wiki article :

Though I could manage setup persistence storage, I still have some doubts :
When I ran the following command : ```
ls -nal /home/ubuntu/node-red
Expected output was :

      drwxrwxr-x 3 1000  100 4096 Oct  2 12:02 .
      drwxrwxr-x 3 1000  100 4096 Oct  2 09:25 ..
     drwxr-xr-x 3 1000 1000 4096 Oct  2 10:23 data

But what I get is :

   drwxr-xr-x 3 0 0 18 Dec 12 04:47 .
  drwxr-xr-x 3 0 0 22 Dec 12 04:47 ..
  drwxr-xr-x 2 0 0  6 Dec 12 04:47 data

Also : when I check root user using "id $USER"
instead of getting root user as 1000, I get -> uid=0(root) gid=0(root) groups=0(root)

So I fixed it by doing following :
I changed my aws task definition to use the user option to override the default userid to '0'. It looks like below now :

     "name": "nodered-image",
    "image": "${container_image}",
    "user": "0:0",
    "restart": "always",
    "essential": true,

So can someone help me understand following things :

  1. Why I am getting root user as 0 instead of 1000 ?
  2. Is overriding using "user": "0:0" is right way to fix the issue? or is their any other better way ?
  3. I am using latest image to create container. Is it a right way or should I be using specific stable version instead?