some things dont work when running behind a reverse proxy

Here is my current setup.

• Nginx listens on port 80 (runs inside docker) and serves other things. Publically visible on port 80 of the server
• Gitlab (this setup) run on a separate docker on port public port 10080
• The nginx serving on port 80 has a redirect from its /git location to an internal ip (172.17.0.N:10080 (gitlab docker)).

The results.

Most things work fine, with a few exceptions.
See here for example
http://vlcore.vectorlinux.com/git/m0e.lnx/flashplugin/builds
Clicking on either of the builds listed there goes nowhere. I can see that it's trying to go to gitlab/git/<rest_of_the_url> whic is wrong.

Is there a way to fix that?
The links work fine if the site is visited on port 10080

Here are the relevant snippets of my config files on the nginx serving on port 80

nginx.conf
[....]
        location /git$ {
            return 301 http://vlcore.vectorlinux.com/git/;
        }

        location /git/ {
            proxy_pass http://gitlab;
       }

[....]

And the additional gitlab.conf used by the main nginx.conf

 upstream gitlab {
        server 172.17.0.1:10080 fail_timeout=0;
        }
   server {
        listen  80;
        server_name     git.vlcore.vectorlinux.com;
        server_tokens   off;
        root            /dev/null;
        client_max_body_size    20m;
        # individual logging
        access_log      /var/log/nginx/gitlab_access.log;
        error_log       /var/log/nginx/gitlab_error.log;

        location / {
        proxy_read_timeout      300;
        proxy_connect_timeout   300;
        proxy_set_header        X-Forwarded-Proto       $scheme;
        proxy_set_header        Host                    $http_host;
        proxy_set_header        X-Real-IP               $remote_addr;
        proxy_set_header        X-Forwarded-For         $proxy_add_x_forwarded_for;
        proxy_set_header        X-Frame-Options         SAMEORIGIN;
        proxy_set_header        Connection      "";
        proxy_pass              http://gitlab/git/;
        # ^^ /git appended because GITLAB_RELATIVE_ROOT is set to '/git/'
        }

}

Any help on how to fix this is greatly appreciated.

Thanks

Start with the nginx.conf and gitlab.conf snippets, then reproduce the build-link failure through /git and compare it with direct access on port 10080. Inspect how the /git proxy path and GITLAB_RELATIVE_ROOT setting affect generated URLs. Done means build links retain the /git prefix and work through the reverse proxy.