Bring back GitLab Pages SSL config

lib/support/nginx/gitlab-pages

+## GitLab
+##
+
 ## Pages serving host
 server {
   listen 0.0.0.0:80;

lib/support/nginx/gitlab-pages-ssl

+## GitLab
+##
+
+## Redirects all HTTP traffic to the HTTPS host
+server {
+  ## Either remove "default_server" from the listen line below,
+  ## or delete the /etc/nginx/sites-enabled/default file. This will cause gitlab
+  ## to be served if you visit any address that your server responds to, eg.
+  ## the ip address of the server (http://x.x.x.x/)
+  listen 0.0.0.0:80;
+  listen [::]:80 ipv6only=on;
+
+  ## Replace this with something like pages.gitlab.com
+  server_name ~^(?<group>.*)\.YOUR_GITLAB_PAGES\.DOMAIN$;
+  server_tokens off; ## Don't show the nginx version number, a security best practice
+
+  return 301  https://$http_host$request_uri;
+
+  access_log  /var/log/nginx/gitlab_pages_access.log;
+  error_log   /var/log/nginx/gitlab_pages_access.log;
+}
+
+## Pages serving host
+server {
+  listen 0.0.0.0:443 ssl;
+  listen [::]:443 ipv6only=on ssl;
+
+  ## Replace this with something like pages.gitlab.com
+  server_name ~^(?<group>.*)\.YOUR_GITLAB_PAGES\.DOMAIN$;
+  server_tokens off; ## Don't show the nginx version number, a security best practice
+  root /home/git/gitlab/shared/pages/${group};
+
+  ## Strong SSL Security
+  ## https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html & https://cipherli.st/
+  ssl on;
+  ssl_certificate /etc/nginx/ssl/gitlab-pages.crt;
+  ssl_certificate_key /etc/nginx/ssl/gitlab-pages.key;
+
+  # GitLab needs backwards compatible ciphers to retain compatibility with Java IDEs
+  ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
+  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
+  ssl_prefer_server_ciphers on;
+  ssl_session_cache shared:SSL:10m;
+  ssl_session_timeout 5m;
+
+  ## See app/controllers/application_controller.rb for headers set
+
+  ## [Optional] If your certficate has OCSP, enable OCSP stapling to reduce the overhead and latency of running SSL.
+  ## Replace with your ssl_trusted_certificate. For more info see:
+  ## - https://medium.com/devops-programming/4445f4862461
+  ## - https://www.ruby-forum.com/topic/4419319
+  ## - https://www.digitalocean.com/community/tutorials/how-to-configure-ocsp-stapling-on-apache-and-nginx
+  # ssl_stapling on;
+  # ssl_stapling_verify on;
+  # ssl_trusted_certificate /etc/nginx/ssl/stapling.trusted.crt;
+  # resolver 208.67.222.222 208.67.222.220 valid=300s; # Can change to your DNS resolver if desired
+  # resolver_timeout 5s;
+
+  ## [Optional] Generate a stronger DHE parameter:
+  ##   sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 4096
+  ##
+  # ssl_dhparam /etc/ssl/certs/dhparam.pem;
+
+  ## Individual nginx logs for GitLab pages
+  access_log  /var/log/nginx/gitlab_pages_access.log;
+  error_log   /var/log/nginx/gitlab_pages_error.log;
+
+  # 1. Try to get /project/ to => shared/pages/${group}/public/ or index.html
+  # 2. Try to get / to => shared/pages/${group}/${host}/public/ or index.html
+  location ~ ^/([^/]*)(/.*)?$ {
+    try_files "/$1/public$2"
+              "/$1/public$2/index.html"
+              "/${host}/public/${uri}"
+              "/${host}/public/${uri}/index.html"
+              =404;
+  }
+
+  # Define custom error pages
+  error_page 403 /403.html;
+  error_page 404 /404.html;
+}