Add Short Note for Komga Installation

Author: MickLesk

json/komga.json

@@ -30,5 +30,10 @@
         "username": null,
         "password": null
     },
-    "notes": []
-}
+    "notes": [
+        {
+            "text": "Starting Komga (Web UI) may take up to 2 minutes after a restart or fresh installation.",
+            "type": "info"
+        }
+    ]
+}