fix: add back cache-control headers

but keep them super short, mostly to reduce traffic via external cache infra

src/index.ts

@@ -61,6 +61,10 @@ addon.use((_req: Request, res: Response, next: NextFunction) => {
   res.setHeader('Access-Control-Allow-Origin', '*');
   res.setHeader('Access-Control-Allow-Headers', '*');
 
+  if (process.env['NODE_ENV'] === 'production') {
+    res.setHeader('Cache-Control', 'max-age=10, public');
+  }
+
   next();
 });