如何设置nginx和子域

我在我的服务器上安装了gitlab,它适用于所有域,例如：git.lars-dev.de,lars-dev.de和* .lars-dev.de我如何才能在git.lars-dev.de上运行gitlab和files.lars-dev.de上的另一个子域名？

我的lars-dev conf：

server {
    listen   *:80; ## listen for ipv4; this line is default and implied
    #listen   [::]:80 default_server ipv6only=on; ## listen for ipv6

    root /var/www/webdata/lars-dev.de/htdocs;
    index index.html index.htm;

    server_name lars-dev.de;

    location / {
        try_files $uri $uri/ /index.html;
    }

    #error_page 500 502 503 504 /50x.html;
    #location = /50x.html {
    #   root /usr/share/nginx/www;
    #}

    # deny access to .htaccess files,if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /.ht {
    #   deny all;
    #}
}

和gitlab配置：

upstream gitlab {
  server unix:/home/git/gitlab/tmp/sockets/gitlab.socket;
}

server {
  listen *:80;         # e.g.,listen 192.168.1.1:80; In most cases *:80 is a good idea
  server_name git.lars-dev.de;     # e.g.,server_name source.example.com;
  server_tokens off;     # don't show the version number,a security best practice
  root /home/git/gitlab/public;

  # individual nginx logs for this gitlab vhost
  access_log  /var/log/nginx/gitlab_access.log;
  error_log   /var/log/nginx/gitlab_error.log;

  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;
  }

  # if a file,which is not found in the root folder is requested,# then the proxy pass the request to the upsteam (gitlab unicorn)
  location @gitlab {
    proxy_read_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694
    proxy_connect_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694
    proxy_redirect     off;

    proxy_set_header   X-Forwarded-Proto $scheme;
    proxy_set_header   Host              $http_host;
    proxy_set_header   X-Real-IP         $remote_addr;

    proxy_pass http://gitlab;
  }
}