feat: move dashboards inside a default dir

This will ease the configuration of external guest users:
while administrators will have access to default dir,
guest users can be authorized to access another directory

Author: gsanchietti

…ageroot/etc/dashboards/connectivity.json …etc/dashboards/default/connectivity.jsonimageroot/etc/dashboards/connectivity.json renamed to imageroot/etc/dashboards/default/connectivity.json imageroot/etc/dashboards/connectivity.json renamed to imageroot/etc/dashboards/default/connectivity.json

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2025 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+if [ -f secret.env ] && ! grep -q "^PROMETHEUS_AUTH_USERNAME=" "$secrets_env"; then
+    prometheus_user=prometheus_$RANDOM
+    prometheus_secret=$(uuidgen | sha256sum | awk '{print $1}')
+    echo "PROMETHEUS_AUTH_USERNAME=$prometheus_user" >> secret.env
+    echo "PROMETHEUS_AUTH_PASSWORD=$prometheus_secret" >> secret.env
+fi