Update app.py

app.py

@@ -13,10 +13,23 @@ import warnings
 warnings.warn = warn
 warnings.filterwarnings('ignore')
 
-# Set your Hugging Face API token here.
-# For deployment on Hugging Face, you can set this as an environment variable.
-import os
-os.environ["HUGGINGFACEHUB_API_TOKEN"] = "hf_YOUR_HUGGINGFACE_TOKEN"
+from dotenv import load_dotenv
+load_dotenv()
+
+from langchain.prompts import PromptTemplate
+from langchain_huggingface import (
+    HuggingFaceEmbeddings,
+    HuggingFaceEndpoint,
+)
+from langchain.schema.runnable import RunnablePassthrough
+from langchain.schema.output_parser import StrOutputParser
+
+# --- 1) CONFIG / SAFETY ---
+
+if not os.getenv("HUGGINGFACEHUB_API_TOKEN"):
+    print("HUGGINGFACEHUB_API_TOKEN not found. Add it to your Space secrets.")
+    raise SystemExit(1)
+
 
 ## LLM - Using an open-source model from Hugging Face
 def get_llm():