nginx configuration for Kibana 4

kibana.conf

upstream kibana {
  server 127.0.0.1:5601 fail_timeout=0;
}

server {
  listen      80;
  return 301 https://example.com;
}

server {
  listen                *:443 ;
  ssl on;
  ssl_certificate /etc/nginx/ssl/all.crt;
  ssl_certificate_key /etc/nginx/ssl/server.key;

  server_name           example.com;
  access_log            /var/log/nginx/kibana.access.log;
  
  location / {
    auth_basic "Restricted Access";
    auth_basic_user_file /etc/nginx/conf.d/kibana.htpasswd;
    proxy_pass http://localhost:5601;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;        
  }
}