diff --git a/docker-compose/tango-prometheus-exporter/README b/docker-compose/tango-prometheus-exporter/README
new file mode 100644
index 0000000000000000000000000000000000000000..62ee6fc30cc4f0cac48f29ddd0d36e5ebea3ca8b
--- /dev/null
+++ b/docker-compose/tango-prometheus-exporter/README
@@ -0,0 +1 @@
+Source: https://gitlab.com/ska-telescope/TANGO-grafana/-/tree/master/