Changes needed to switch from local to colab

app.py

@@ -1,10 +1,16 @@
 import gradio as gr
 from llama_cpp import Llama
 import datetime
+import os
+import datetime
+from huggingface_hub import hf_hub_download  
 
 #MODEL SETTINGS also for DISPLAY
 convHistory = ''
-modelfile = "model/stablelm-zephyr-3b.Q4_K_M.gguf"
+modelfile = hf_hub_download(
+        repo_id=os.environ.get("REPO_ID", "TheBloke/stablelm-zephyr-3b-GGUF"),
+        filename=os.environ.get("MODEL_FILE", "stablelm-zephyr-3b.Q4_K_M.gguf"),
+    )
 repetitionpenalty = 1.15
 contextlength=4096
 logfile = 'StableZephyr3b_logs.txt'