Update Dockerfile

Dockerfile

@@ -10,7 +10,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Create uploads directory and feedback.json with proper permissions
 RUN mkdir -p static/uploads static/audio && \
     touch feedback.json && \
-    chmod 777 static && \
+    chmod -R 777 static && \
     chmod 666 feedback.json
 
 # Run as non-root user for security