Update app.py

app.py

@@ -1,9 +1,17 @@
 import gradio as gr
 from huggingface_hub import InferenceClient
+import os
 
 """
 For more information on `huggingface_hub` Inference API support, please check the docs: https://huggingface.co/docs/huggingface_hub/v0.22.2/en/guides/inference
 """
+
+# Main code to run the application
+if __name__ == '__main__':
+    api_token = os.getenv('HF_API_TOKEN')
+    if not api_token:
+        raise ValueError("HF_API_TOKEN not found in environment variables")
+        
 client = InferenceClient("meta-llama/Meta-Llama-3-70B-Instruct")
 
 system_message="""