Я использовал Apache2 до того, как установил GitLab на свой VPS. Я просто хочу сделать GitLab поддоменом моего сайта (git.example.com), и чтобы мой основной сайт (www.example.com) посмотрел на /var/www/html/index.html

Вот мой файл nginx.conf на данный момент:

user www-data;
worker_processes  1;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
    # multi_accept on;
}

http {
    include       /etc/nginx/mime.types;

    access_log  /var/log/nginx/access.log;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;
    tcp_nodelay        on;

    gzip  on;
    gzip_disable "MSIE [1-6]\.(?!.*SV1)";

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;

upstream gitlab {

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

    server {

        listen 80;
        server_name www.example.com;
        root /home/gitlab/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_redirect     off;

            # you need to change this to "https", if you set "ssl" directive to "on"
            proxy_set_header   X-FORWARDED_PROTO http;
            proxy_set_header   Host              $http_host;
            proxy_set_header   X-Real-IP         $remote_addr;

            proxy_pass http://gitlab;
        }
    }

}