Add disk usage snapshot reports

config.example.yaml

@@ -23,6 +23,13 @@ alerts:
   smart_cooldown_sec: 21600
   smart_temp_warn: 50
 
+disk_report:
+  threshold: 90
+  cooldown_sec: 21600
+  top_dirs: 8
+  docker_dir: "/var/lib/docker"
+  logs_dir: "/var/log"
+
 audit:
   enabled: true
   path: "/var/server-bot/audit.log"