docerfile update

Dockerfile

@@ -8,9 +8,12 @@ COPY app/requirements.txt ./backend-requirements.txt
 COPY fe/requirements.txt ./frontend-requirements.txt
 RUN pip install --no-cache-dir -r backend-requirements.txt -r frontend-requirements.txt
 
+# Set writable cache directory using HF_HOME
+ENV HF_HOME=/usr/src/app/hf_cache
+RUN mkdir -p /usr/src/app/hf_cache
+
 # Set PYTHONPATH to ensure all modules are discoverable
 ENV PYTHONPATH=/usr/src/app
-ENV TRANSFORMERS_CACHE=/usr/src/app/cache
 
 # Copy backend files
 COPY config.py ./config.py