feat(reverse_proxy): add Netcup DNS ACME challenge support and refactor Caddy setup

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/reverse_proxy/handlers/main.yml

@@ -1,4 +1,11 @@
 ---
-- name: Restart Caddy
-  ansible.builtin.command: "{{ caddy_binary }} reload --config {{ caddy_config_path  }}"
+- name: Restart caddy service
+  ansible.builtin.systemd:
+    name: caddy
+    state: restarted
+  become: true
+
+- name: Update apt cache
+  ansible.builtin.apt:
+    update_cache: true
   become: true