Gitlab on an OpenVZ Server with nginx - Authentication Required popup - nginx

Question

I am experiencing an issue where trying to access GitLab through my browser is providing me with a popup for Authentication. It looks like a .htaccess authentication popup, but I have not configured htaccess authentication with my nginx configuration.
Authentication Required
The server at http://git.servername.com:80 requires a username and password.
The server says: Password Protected.
Username:
Password:
I have tried troubleshooting this issue for a couple of days now, but I am running into some dead ends, since I see no information in my nginx error logs, or my GitLab production.log.
I recently performed an installation of GitLab on Ubuntu 12.04 (following this guide: https://www.digitalocean.com/community/articles/how-to-set-up-gitlab-as-your-very-own-private-github-clone), and ran into some issues with not having enough memory on OpenVZ. I created some fake swap to get over this hurdle, and I have verified that the GitLab server is running. My verification and configuration information is as follows:
GitLab Verification
user#server:/home/git/gitlab$ sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production
Checking Environment ...
Git configured for git user? ... yes
Has python2? ... yes
python2 is supported version? ... yes
Checking Environment ... Finished
Checking GitLab Shell ...
GitLab Shell version >= 1.7.0 ? ... OK (1.7.0)
Repo base directory exists? ... yes
Repo base directory is a symlink? ... no
Repo base owned by git:git? ... yes
Repo base access is drwxrws---? ... yes
post-receive hook up-to-date? ... yes
post-receive hooks in repos are links: ... can't check, you have no projects
Checking GitLab Shell ... Finished
Checking Sidekiq ...
Running? ... yes
Checking Sidekiq ... Finished
Checking GitLab ...
Database config exists? ... yes
Database is SQLite ... no
All migrations up? ... yes
GitLab config exists? ... yes
GitLab config outdated? ... no
Log directory writable? ... yes
Tmp directory writable? ... yes
Init script exists? ... yes
Init script up-to-date? ... yes
Projects have satellites? ... can't check, you have no projects
Redis version >= 2.0.0? ... yes
Your git bin path is "/usr/bin/git"
Git version >= 1.7.10 ? ... yes (1.9.1)
Checking GitLab ... Finished
Environment Info
user#server:/home/git/gitlab$ sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production
System information
System: Ubuntu 12.04
Current User: git
Using RVM: no
Ruby Version: 2.0.0p247
Gem Version: 2.0.3
Bundler Version:1.6.0
Rake Version: 10.1.0
GitLab information
Version: 6.0.2
Revision: 10b0b8f
Directory: /home/git/gitlab
DB Adapter: mysql2
URL: http://git.servername.com
HTTP Clone URL: http://git.servername.com/some-project.git
SSH Clone URL: git#git.servername.com:some-project.git
Using LDAP: no
Using Omniauth: no
GitLab Shell
Version: 1.7.0
Repositories: /home/git/repositories/
Hooks: /home/git/gitlab-shell/hooks/
Git: /usr/bin/git
Nginx Configuration
In my default.conf file:
server {
listen 80;
server_name git.servername.com;
location / {
proxy_pass http://git.servername.com:80;
}
}
Hosts file on my personal machine (not my VPS)
<IP Address of VPS> git.servername.com