server {
  listen 443      ssl default_server;
  listen [::]:443 ssl default_server;
  http2 on;

  ssl_certificate      ${znc_tls_cert};
  ssl_certificate_key  ${znc_tls_key};

  add_header Strict-Transport-Security "max-age=63072000" always;

  location / {
    proxy_http_version 1.1;

    proxy_set_header Host \$host;
    proxy_set_header X-Real-IP \$remote_addr;
    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto \$scheme;

    proxy_pass http://127.0.0.1:${znc_http_port}/;
  }
}