add hf_cache folder

Dockerfile

@@ -10,6 +10,12 @@ WORKDIR /code
 
 # Copy code
 COPY ./app /code/app
+
+# Create hf_cache and make it world-writable so the non-root runtime user can use it
+RUN mkdir -p /code/app/hf_cache \
+  && chmod -R a+rwX /code/app/hf_cache
+
+# Copy and install Python dependencies
 COPY requirements.txt ./
 
 # Install Python dependencies