server {
         listen       80;
         listen  [::]:80;
         server_name  localhost;

         location / {
             root   /usr/share/nginx/html;
             index  index.html index.htm;
             try_files $uri $uri/ /index.html;
         }

         location = /50x.html {
             root   /usr/share/nginx/html;
         }

}