What is the ‘docker user’ ?
Until now I had every docker container running with PUID and PGID.
For the PUID/PGID I used the userid and groupid of an account that I specifically created for Docker.
For standard sysnology often the default admin account is used: 1026/100.
From what I understand is that at synology they discourage using the root account.
So my docker user 1026/100 has indeed RW access to /volume1/docker/n8n.