conv url to env var

app.py

@@ -4,13 +4,14 @@ from gradio_client import Client
 import time
 
 hf_key = os.environ['HF_API_KEY']
+client_url = os.environ['BK_URL']
 
 messages = [
     {"role": "system", "content": "You are a helpful assistant."},
 ]
 msg_count = 0
  
-client = Client("https://amitagh-medbot-back.hf.space/--replicas/zlb8n/", hf_token=hf_key)
+client = Client(BL_URL, hf_token=hf_key)
 def get_llm_rsp(text):
   rsp = client.predict(
 		text,	# str  in 'Input your question:' Textbox component