Fix cache permission error with explicit directory creation

Dockerfile

@@ -5,10 +5,15 @@ FROM python:3.10-slim
 WORKDIR /code
 
 # --- FIX FOR PERMISSION ERROR ---
-# Set an environment variable to use a writable directory for the cache
+# 1. Set environment variables to tell libraries where to cache files.
 ENV HF_HOME=/tmp/huggingface_cache
 ENV TORCH_HOME=/tmp/torch_cache
 
+# 2. Explicitly create the cache directory and give it open permissions.
+# This is safe within a container and ensures the application can write here.
+RUN mkdir -p $HF_HOME && chmod -R 777 $HF_HOME
+RUN mkdir -p $TORCH_HOME && chmod -R 777 $TORCH_HOME
+
 # Install system dependencies required by OpenCV
 RUN apt-get update && apt-get install -y \
     libgl1-mesa-glx \