fix: do not cache pdfs

next.config.mjs

@@ -103,6 +103,15 @@ const nextConfig = {
           },
         ],
       },
+      {
+        source: "/articles/:path*\\.pdf",
+        headers: [
+          {
+            key: "Cache-Control",
+            value: "public, max-age=0, must-revalidate",
+          },
+        ],
+      },
     ]
   },
   // Configure compiler for modern browsers