Add GPU support and update requirements for spaces library

app.py

@@ -1,3 +1,4 @@
+import spaces
 import gradio as gr
 from langchain_huggingface.llms import HuggingFacePipeline
 from langchain.prompts import PromptTemplate
@@ -19,6 +20,7 @@ prompt = PromptTemplate(
 # Create a chain with the model pipeline and prompt template
 chain = prompt | llm
 
+@spaces.GPU
 def ask_question(question: str) -> str:
     # Invoke your chain and return the generated answer.
     response = chain.invoke({"question": question})

requirements.txt

@@ -1,3 +1,4 @@
+spaces
 gradio
 langchain
 langchain_huggingface