From ab8386adea69579f50bdf476e568d6a187005434 Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Wed, 23 Aug 2023 02:10:57 +0900
Subject: [PATCH] Set no-cache on unfurl failure fallback response

---
 unfurler/src/index.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/unfurler/src/index.ts b/unfurler/src/index.ts
index e3e8e07eb..8841548ca 100644
--- a/unfurler/src/index.ts
+++ b/unfurler/src/index.ts
@@ -251,6 +251,7 @@ class Server {
 
       if (!img) {
         // send local fallback image file
+        res.set('Cache-control', 'no-cache');
         res.sendFile(nodejsPath.join(__dirname, matchedRoute.fallbackImg));
       } else {
         res.contentType('image/png');