Modified Docker file

app.py

@@ -114,8 +114,6 @@ def process_txt():
   vectordb = Chroma.from_documents(documents=texts, 
                                  embedding=embeddings,
                                  persist_directory=persist_directory)
-  vectordb.persist()
-  vectordb = None
   vectordb = Chroma(persist_directory=persist_directory, 
                   embedding_function=embeddings)
   retriever = vectordb.as_retriever()