Problem with config.json after each qnap restart

[lukjod]

I have strange problem, that after every restart of my qnap config file with login and passwords inside for watchtower is changing from file into open folder. So after every restart i must delete that folder and create new file from ssh. When using script which after every restart tries to do it automatically it doesn't see that directory in my case /root/.docker/config.json.
My script is called by RunLast mathod which calls scripts after complete qnap restart with fully started enviroment.
script:

#!/bin/bash
PATH=/opt/bin:/opt/sbin:/share/CACHEDEV1_DATA/.qpkg/container-station/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/bin/X11:/usr/local/sbin:/usr/local/bin:/root/.docker:$PATH
sleep 300s
docker stop gotify
sleep 3s
rm -r /root/.docker/config.json
rmdir --ignore-fail-on-non-empty /root/.docker/config.json
docker stop watchtower
sleep 3s
docker login -u lukjod -p *************
sleep 3s
docker login ghcr.io/haveagitgat/tdarr -u lukjod -p ghp_C3Zu6lnz1111111111111111
sleep 3s
docker start gotify
sleep 3s
docker start watchtower

log

`RunLast (20230112)
[Wed Jan 10 18:36:06 CET 2024] begin "start" scripts ...
[Wed Jan 10 18:36:06 CET 2024] -> execute: "'/share/CACHEDEV1_DATA/.qpkg/RunLast/scripts/10-crontab_restart.sh'" ...
[Wed Jan 10 18:36:12 CET 2024] => exitcode: (0)
[Wed Jan 10 18:36:12 CET 2024] => stdout: "Stopping periodic command scheduler: crond.
Starting periodic command scheduler: crond."
[Wed Jan 10 18:36:12 CET 2024] => stderr: ""
[Wed Jan 10 18:36:12 CET 2024] -> execute: "'/share/CACHEDEV1_DATA/.qpkg/RunLast/scripts/20-docker_restart.sh'" ...
[Wed Jan 10 18:41:27 CET 2024] => exitcode: (1)
[Wed Jan 10 18:41:27 CET 2024] => stdout: "watchtower
Login Succeeded
Login Succeeded
gotify"
[Wed Jan 10 18:41:27 CET 2024] => stderr: "rmdir: '/root/.docker/config.json': No such file or directory
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /share/homes/admin/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /share/homes/admin/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/root/.docker/config.json" to rootfs at "/config.json": mount /root/.docker/config.json:/config.json (via /proc/self/fd/6), flags: 0x5000: not a directory: unknown: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type
Error: failed to start containers: watchtower"
[Wed Jan 10 18:41:27 CET 2024] end "start" scripts`

Can someone help?