new setup receiving CSRF token failure

Symfony\Component\HttpKernel\Exception\BadRequestHttpException CSRF token validation failed on clean install when instructions are followed exactly.

It appears as though the entrypoint ignores environment variables and sets session driver to default.

Inspect the Docker entrypoint and its environment-variable handling first, then reproduce the clean-install setup exactly as documented. Done means the documented setup preserves the intended session configuration and no longer fails Symfony CSRF token validation.

Written by the indexing model from the issue text.