fix: default config fault, add MDNS.Enabled back

Author: daviddias

src/init-files/default-config-browser.json

@@ -4,6 +4,11 @@
     "API": "/ip4/127.0.0.1/tcp/5002",
     "Gateway": "/ip4/127.0.0.1/tcp/9090"
   },
-  "Discovery": {},
+  "Discovery": {
+    "MDNS": {
+      "Enabled": false,
+      "Interval": 10
+    }
+  },
   "Bootstrap": []
 }