Add temporary DuckDuckGo limitation warning

Author: MarcellM01

README.md

@@ -1,5 +1,8 @@
 # TinySearch
 
+> [!WARNING]
+> TinySearch is temporarily affected by DuckDuckGo limiting automated searches from some environments. We are switching the search layer to SearxNG. Please give us a few days and we will be back with a more reliable setup.
+
 <p align="center">
   <img src="assets/tinysearch_logo.png" alt="TinySearch" width="240" />
 </p>
@@ -367,4 +370,4 @@ distributions under their model-card licenses; keep license and attribution
 notices if you ship or redistribute those files. Optional manual export for
 `fast` uses `sentence-transformers/all-MiniLM-L6-v2` (Apache-2.0).
 
-See [NOTICE](NOTICE) for Docker and third-party distribution notes.
+See [NOTICE](NOTICE) for Docker and third-party distribution notes.