docker/setup-buildx-action fail if DOCKER_TLS_VERIFY is true

[Hazmi35]

Also reproducible by entering the worker container: Running $ docker buildx create will result in error:

error: could not create a builder instance with TLS data loaded from environment. Please use `docker context create <context-name>` to create a context for current environment and then create a builder instance with `docker buildx create <context-name>`

This is can somewhat be fixed with: docker/setup-buildx-action#16 (comment)

but, then another problem appears:

It is caused by buildx not using the DOCKER_TLS_VERIFY=1, I'll find a real solution, and reporting this problem to buildx team, until then, I would disable TLS.

TL/DR: docker/setup-buildx-action would fail if using DOCKER_TLS_VERIFY feature

Please do not expose port 2376 on DinD container, and please be aware about UFW+Docker problem