backend rails_dev {
      .host = "127.0.0.1";
      .port = "80";
}

sub vcl_recv {
  set req.grace = 3m;
  if (req.url ~ "^/admin" || req.url == "/ping" ) {
    return(pass);
  }
}

sub vcl_fetch {
  set beresp.grace = 10m;
  set beresp.http.X-Powered-by = "Bistromathic drive";
  set beresp.http.Will-ttl = beresp.ttl;

  esi;
}