varnish add

deploy/varnish/default.vcl

@@ -47,7 +47,12 @@ sub vcl_backend_response {
 }
 
 sub vcl_deliver {
-  set resp.http.X-Cache = obj.hits > 0 ? "HIT" : "MISS";
+  if (obj.hits > 0) {
+    set resp.http.X-Cache = "HIT";
+  } else {
+    set resp.http.X-Cache = "MISS";
+  }
+
   set resp.http.X-RateLimit-Limit = "10";
   set resp.http.X-RateLimit-Window = "10s";
-}
+}