Merge torrust#60: Backup Grafana dashboard config

f0f35f7 chore: [#32] backup grafana dashboard config (Jose Celano)

Pull request description:

  Backup Grafana dashboard config.

ACKs for top commit:
  josecelano:
    ACK f0f35f7

Tree-SHA512: 1b6d097ed640df6dc01ff8ebc350ab145b8e5ec81db4bba3dc57263d59bb93085827c0f93a9d1d75fef31f7a748fae1c3a8d99b8c5bc31eaa0b913c40e52b617

Author: josecelano

share/grafana/dashboards/README.md

@@ -0,0 +1,5 @@
+# Grafana Dashboards Backup
+
+Backups containing the dashboard configuration for Grafana.
+
+- `stats.json`: The dashboard using metrics from the `stats` endpoint: <http://localhost:1212/api/v1/stats?token=MyAccessToken&format=prometheus>.