Alpine: use busybox-ntp instead of ntp

ntp is not available, closes #6

roles/timesync-enabled/tasks/main.yml

@@ -7,6 +7,13 @@
     success_msg: 'Found supported timesync service »{{ timesync_daemon }}«'
 
 
+- name: Change daemon from ntp to busybox-ntp on Alpine
+  set_fact:
+    timesync_daemon: "busybox-ntp"
+  changed_when: True
+  when: timesync_daemon == "ntp" and ansible_os_family|lower == "alpine"
+
+
 - name: Include each network variables if there is no host variable
   include_vars: "{{ timesync_varfile_network }}"
   vars: