Update README.md

Added fallback instructions.

README.md

@@ -10,4 +10,7 @@ pinned: false
 license: apache-2.0
 ---
 
-A chatbot to demo [SafeSQL-v1](https://huggingface.co/deathsaber93/SafeSQL-v1)
+A chatbot to demo [SafeSQL-v1](https://huggingface.co/deathsaber93/SafeSQL-v1).
+
+**NOTE:** If the demo is not working (as I am on a free-tier HF account), then you may download the `sqid.keras`, `app.py` and `requirements.txt` files, install the requirements and run
+`python3 app.py`.