.dockerignore not work

General
1 
$ tree -a
├── a.txt
├── b.txt
├── compose.yml
├── c.txt
├── Dockerfile
└── .dockerignore



$ cat compose.yml 
services:
    test:
        build: .
        volumes:
            - type: bind
              source: .
              target: /data



$ cat Dockerfile 
FROM bash


$ cat .dockerignore 
a.txt
b.txt
c.txt




$ docker compose run --rm test ls -1 /data 
Dockerfile
a.txt
b.txt
c.txt
compose.yml



$ docker compose run --rm test ls -1 /data | grep txt && echo FILES NOT IGNORED
a.txt
b.txt
c.txt
FILES NOT IGNORED

FILES NOT IGNORED
Why?

2

The .dockerignore file tells Docker which files and directories to exclude from the build context when running docker build. For example when using

FROM bash
COPY . /data

the files from .dockerignore are not included in the image.

But you are using a bind mount with volumes, which mounts the files into the container.

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