fix permission issue on docker

Dockerfile

@@ -22,8 +22,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY . .
 
 # Create necessary directories and set permissions
-RUN mkdir -p /app/uploads /app/static/uploads && \
-    chown -R celery:celery /app
+RUN mkdir -p /app/uploads/rooms /app/static/uploads && \
+    chown -R celery:celery /app && \
+    chmod -R 755 /app/uploads
 
 # Create and set up startup script
 RUN echo '#!/bin/bash\n\