server {
  listen $PORT;

  root /usr/share/nginx/html;
  index index.html;

  server_tokens off;
  server_name _;

  gzip on;
  gzip_disable "msie6";

  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_buffers 16 8k;
  gzip_http_version 1.1;
  gzip_min_length 0;
  gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

  location / {
    try_files $uri /index.html;
  }
}