Add cache

app.py

@@ -6,10 +6,12 @@ from loader import load_documents
 
 st.title("SAIRA")
 
+@st.cache_resource
 def load_docs_and_build_index(context):
     docs = load_documents()
     return build_index(docs, context)
 
+@st.cache_resource
 def load_context():
     return build_service_context()