docs: Add 16, update 2 and remove 2 files

graylog/_volumes.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+# Define volume items for graylog containers
+# These are used across backup, restore, create, and destroy operations
+# Docker Compose creates volumes with project name prefix: {project}_{volume_name}
+
+get_graylog_volumes() {
+    echo "volume:mongodb_data:${CONTAINER_NAME}_mongodb_data"
+    echo "volume:opensearch_data:${CONTAINER_NAME}_opensearch_data"
+    echo "volume:graylog_data:${CONTAINER_NAME}_graylog_data"
+}