added permissions for writing

Dockerfile

@@ -46,9 +46,10 @@ COPY data ./data
 # Copy the built frontend from the builder stage
 COPY --from=builder /app/ui/claimcheck-ui/dist ./static
 
-# Create necessary directories and fix cache permissions
+# Create necessary directories and fix permissions
 RUN mkdir -p kb/index data/audio /.cache && \
-    chmod 777 /.cache
+    chmod -R 777 data/audio && \
+    chmod -R 777 /.cache
 
 # Set environment variables for production
 ENV PYTHONUNBUFFERED=1