Add required runners.docker section to example config.
Documentation fix to work-around https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/issues/2508
The example config file causes a Panic / SIGSEGV.
Documentation fix to work-around https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/issues/2508
The example config file causes a Panic / SIGSEGV.