Read document in subdirectory data

app.py

@@ -6,10 +6,11 @@ from llama_index.core import VectorStoreIndex, SimpleDirectoryReader
 from llama_index.embeddings.huggingface import HuggingFaceEmbedding
 from llama_index.core import Settings
 
+openai.api_key = os.environ['OpenAI_ApiKey']
 Settings.embed_model = HuggingFaceEmbedding(model_name="BAAI/bge-small-en-v1.5")
 
+documents = SimpleDirectoryReader("data").load_data()
 
-openai.api_key = os.environ['OpenAI_ApiKey']
 def greet(name):
     return "Hello " + name + "!!"