proxy.conf

server {
    listen 80;
    server_name SERVER_NAME;

    access_log /var/log/nginx-access.log;
    error_log /var/log/nginx-error.log;

    # required to avoid HTTP 411: see Issue #1486 (https://github.com/dotcloud/docker/issues/1486)
    chunked_transfer_encoding on;

    proxy_redirect off;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    client_max_body_size 0;
    client_body_buffer_size 128k;
    proxy_connect_timeout 90;
    proxy_send_timeout 90;
    proxy_read_timeout 90;
    proxy_buffers 32 4k;

    location / {
        auth_basic "Restricted";
        auth_basic_user_file /etc/nginx/.htpasswd;
        proxy_pass http://UPSTREAM_ADDRESS:UPSTREAM_PORT;
    }
}