added read-only mode + visual improvements

pages/api/v1/tokens/index.ts

@@ -11,6 +11,12 @@ export default async function tokens(
   if (!user) return;
 
   if (req.method === "POST") {
+    if (process.env.DEMO_MODE === "true")
+      return res.status(400).json({
+        response:
+          "This action is disabled because this is a read-only demo of Linkwarden.",
+      });
+
     const token = await postToken(JSON.parse(req.body), user.id);
     return res.status(token.status).json({ response: token.response });
   } else if (req.method === "GET") {