Merge branch 'deploy_page_all' into 'master'

Make deploy page show on all pages, when up

This change will make Nginx display the deploy page for *all* GitLab pages when it's up. Previously only the root/index of GitLab would show deploy. Everyone else may get errors if visiting a page directly. 

See merge request !540

files/gitlab-cookbooks/gitlab/templates/default/nginx-gitlab-http.conf.erb

@@ -98,7 +98,7 @@ server {
   location / {
     ## Serve static files from defined root folder.
     ## @gitlab is a named location for the upstream fallback, see below.
-    try_files $uri $uri/index.html $uri.html @gitlab;
+    try_files $uri /index.html $uri.html @gitlab;
   }
 
   location /uploads/ {