Create a password for nginx basic auth access

This will create a auth file for nginx using later.

 sudo htpasswd /etc/nginx/.htpasswd user2

#When access http://xxx.com/github/ will proxy the github.com  
location /github/ {
      index index.html;
      auth_basic    "Admin";
      auth_basic_user_file  /etc/nginx/.htpasswd;
      proxy_pass      https://github.com/;
      proxy_set_header  X-Real-IP  $remote_addr;  
  }

Below will add configure for nginx use .htpasswd.