Update app.py

app.py

@@ -31,7 +31,14 @@ def process_pdf(uploaded_file):
 
 def create_vectorstore(splits):
     embeddings = OpenAIEmbeddings()
-    vectorstore = Chroma.from_documents(splits, embeddings)
+    vectorstore = Chroma.from_documents(
+        splits, 
+        embeddings, 
+        client_settings=Settings(
+            chroma_db_impl="duckdb+parquet",  # Use DuckDB in-memory for Chroma
+            persist_directory=None  # No need for persistent storage
+        )
+    )
     retriever = vectorstore.as_retriever()
     return retriever