Where is the GitLab nginx configuration file?

gitlab-ce default backup location

  gitlab_rails['backup_path'] = "/var/opt/gitlab/backups"    

Reconfigure / Update / Renew expired certificate with Gitlab CE

  If cron job failed to run it wasn't noticed you may have to make another request for your gitlab certificate. Here's a one liner that should help point you into the right direction. /root/letsenc

gitlab backup path on debian

Effective as of gitlab 8.6.0+ /var/opt/gitlab/backups

Let's Encrypt and GitLab

    https://webnugget.de/setting-up-gitlab-with-free-ssl-certs-from-lets-encrypt-on-ubuntu-14-04/    

gitlab backup instructions

    https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/raketasks/backup_restore.md