Fix(judgehost): works with Debian12 + docker

roles/configure_judgehost_legacy/handlers/main.yml

@@ -0,0 +1,14 @@
+---
+- name: Update grub
+  ansible.builtin.command: |
+    update-grub
+  changed_when: true
+- name: Reboot
+  ansible.builtin.reboot:
+- name: Systemd daemon-reload
+  ansible.builtin.systemd_service:
+    daemon_reload: true
+- name: Restart judgehost
+  ansible.builtin.systemd_service:
+    name: domjudge-judgehost.target
+    state: restarted