server {

    listen 443 ssl http2;
    listen [::]:443 ssl http2;

    ssl_certificate      /ssl/chain.crt;
    ssl_certificate_key  /ssl/certificate.keyplain;

    error_page 403 404 /403_404.html;
    location = /403_404.html {
	    default_type application/json;
	    return 200 'You are not authorized to access this page.';
    }

    location / {
      proxy_set_header X-Forwarded-For $remote_addr;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header Host $http_host;

      proxy_connect_timeout 600s;
      proxy_send_timeout 600s;
      proxy_read_timeout 600s;
      send_timeout 600s;

      proxy_pass http://synapse-admin;
    }
}