Simple varnish config for boring sites

simple.vcl

backend default {
    .host = "127.0.0.1";
    .port = "8080";
}

sub vcl_recv {
  if (req.backend.healthy) {
    set req.grace = 30s;
  } else {
    set req.grace = 30m;
  }
}

sub vcl_fetch {
   set beresp.grace = 30m;
}