Set DEEPFACE_HOME environment variable to a writable /tmp directory for cache

src/streamlit_app.py

@@ -1,5 +1,7 @@
 import os
 import streamlit as st
+# Point the cache directory to the guaranteed writable /tmp folder
+os.environ['DEEPFACE_HOME'] = '/tmp/.deepface'
 import numpy as np
 import torch
 import whisper