Update app.py

app.py

@@ -28,6 +28,9 @@ def get_vectorstore(text_chunks):
         model_kwargs=model_kwargs,
         encode_kwargs=encode_kwargs
     )
+    vectorstore_path = "docs/chroma/"
+    if not os.path.exists(vectorstore_path):
+        os.makedirs(vectorstore_path)
     vectorstore = Chroma.from_documents(
         documents=text_chunks, embedding=embeddings, persist_directory="docs/chroma/")
     return vectorstore