Extend cache length

api/images.js

@@ -12,7 +12,8 @@ router.get('/:uuid/:size', async (req, res) => {
 
   const image = await db.item.getImage(req.params.uuid, req.params.size)
 
-  const cacheSeconds = 60 * 60 * 24;
+  // Cache a month
+  const cacheSeconds = 60 * 60 * 24 * 30;
   res.set('Cache-Control', cacheSeconds);
 
   if(extension === "webp") {