GitLab installation on ubuntu server problem

I have a problem with GitLab-CE installation. I followed this article
Running GitLab from a subdirectory on Apache so I have started installation from this article and I stopped on installing Nginx and went back to the first article. Everything went smoothly without any errors, I have access to gitlab subdirectory page (gitlab public folder) but instead of opening GitLab page for changing password or login I can see only directory structure which means I can open files from public folder like 404.html, 503.html, deploy.html and so on and that’s it. Did I miss something during installation?