Adding chroma db pull

app.py

@@ -14,6 +14,11 @@ from langchain.vectorstores import Chroma
 openai_api_key = os.getenv("openapi_token")
 embedding = OpenAIEmbeddings(openai_api_key=openai_api_key)
 
+# Setup vector database
+persist_directory = './chroma_db'
+vectordb = Chroma(persist_directory=persist_directory, embedding_function=embedding)
+
+
 # Streamed response emulator
 def response_generator():
     response = random.choice(