error: GID 1000 did not exist and had to be created manually after container start.

[the-cleaner]

I used the docker-compose.yaml from the readme, effect, exactly as stated above.

[myrison]

If you mean that this message is logged upon container startup, this is normal behavior as the user is created inside the docker container as a part of the script. Is it causing a problem? (more detail in your issue report might be helpful)