automatically set NGINX_X_FORWARDED_PROTO to https when GITLAB_CI_HTTPS is true
automatically set NGINX_X_FORWARDED_PROTO to https when GITLAB_CI_HTTPS is true

outcoldman/docker-gitlab-ci,youhong316/docker-gitlab-ci,outcoldman/docker-gitlab-ci,bboehmke/docker-gitlab-ci,adiferd/docker-gitlab-ci,sameersbn/docker-gitlab-ci,sameersbn/docker-gitlab-ci,adiferd/docker-gitlab-ci,youhong316/docker-gitlab-ci,bboehmke/docker-gitlab-ci