pg_upgrade needs stricter permissions

upgrade-entrypoint.sh

@@ -16,6 +16,7 @@ if [ -f "$OLD_VERSION_FILE" ]; then
         # Move old data to a temporary folder
         mkdir -p $DATA_DIR/old_data
         mv $DATA_DIR/* $DATA_DIR/old_data/ || true
+				chmod 700 $DATA_DIR/old_data
         
         # Initialize new data directory
 				mkdir $DATA_DIR/new_data