.dockerignore file is not honored by ImageFromDockerfile

For Docker build performance, it can be very important for certain projects to have a .dockerignore file so that extra content is not sent to the Docker daemon (which may be on a different machine).

It appears that the underlying docker-java API does support .dockerignore files:
https://github.com/docker-java/docker-java/blob/master/src/test/java/com/github/dockerjava/cmd/BuildImageCmdIT.java#L176

However, if I try an invalid .dockerignore in one of my Testcontainers projects, then it does not appeared to be honored. I was able to confirm this with the following steps:

1. Add invalid content in a .dockerignore file like this:

*~
[a-b-c]

2. Run docker build . and verify it fails
3. Run equivalent command through TC API and it passes (it should fail due to invalid syntax)

new ImageFromDockerfile()
                        .withFileFromPath(".", Paths.get(".")))

Parti da ImageFromDockerfile e confronta il suo comportamento di trasferimento dei file con il test docker-java BuildImageCmdIT.java collegato nell’issue. Riproduci l’esempio .dockerignore non valido sia tramite docker build . sia tramite l’API Testcontainers. Il lavoro è completato quando l’API rispetta la sintassi di .dockerignore e rifiuta il pattern non valido come Docker.