updated readme

README.md

@@ -102,9 +102,26 @@ The app offers two ways to find relevant documents:
 
 ---
 
-## Notes
+## General Notes
 
 - The app currently supports GDPR (General Data Protection Regulation) and LED (Law Enforcement Directive) legal documents.  
 - **GDPR** is the EU regulation governing data protection and privacy for individuals within the European Union.  
 - **LED** (Law Enforcement Directive) regulates the processing of personal data by EU law enforcement authorities for the prevention, investigation, detection, or prosecution of criminal offenses.  
-- Summaries are based only on the retrieved documents; the model does not generate external information.  
+- Summaries are based only on the retrieved documents; the model does not generate external information.
+
+---
+
+## Notes on Hugging Face Free Inference API
+
+This project uses the free-tier Hugging Face Inference API to run `pszemraj/led-large-book-summary`
+
+The free tier is CPU-only and shared by all users. Because of this, you may occasionally encounter:
+
+- 504 Gateway Timeout
+- 503 Service Unavailable
+
+These issues usually mean the backend is overloaded or the request took too long.
+
+### Tips
+- Wait a few minutes and try again
+- Try a different query if yours retrieved very long documents