feat: add alpine support for hostname management

tasks/hostname.yaml

@@ -4,10 +4,10 @@
 - name: "set hostname"
   ansible.builtin.hostname:
     name: "{{ set_hostname | default(inventory_hostname_short) }}"
-    use: "{{ hostname_use_method }}"
+    use: "{{ hostname_use_method | default(hostname_method_map[ansible_os_family]) }}"
   tags: "hostname"
 
-# manage /etc/hosts file
+# manage /etc/hosts
 - name: "manage /etc/hosts file for hostname"
   ansible.builtin.lineinfile:
     path: "/etc/hosts"