Add DDNS support (#324)

* feat: add ddns updater framework

Note: no functionality implemented yet

* feat: add webhook ddns provider

* feat: update dashboard template

* fix: check nil and cron task string

* fix: webhook string formated with unexcepted param

* fix: webhook header split error

* feat: cloudflare ddns provider

* refract: move ddns update trigger into ReportSystemInfo

* lang: update other languages text

* fix: clear codes and logics

* fix: move update ddns to goroutine to avoid blocking

* fix: clear unused codes

* fix: update timestamp to prevent cache

resource/template/dashboard-default/server.html

@@ -29,6 +29,8 @@
                     <th>IP</th>
                     <th>{{tr "VersionNumber"}}</th>
                     <th>{{tr "HideForGuest"}}</th>
+                    <th>{{tr "EnableDDNS"}}</th>
+                    <th>{{tr "DDNSDomain"}}</th>
                     <th>{{tr "Secret"}}</th>
                     <th>{{tr "OneKeyInstall"}}</th>
                     <th>{{tr "Note"}}</th>
@@ -45,6 +47,8 @@
                     <td>{{$server.Host.IP}}</td>
                     <td>{{$server.Host.Version}}</td>
                     <td>{{$server.HideForGuest}}</td>
+                    <td>{{$server.EnableDDNS}}</td>
+                    <td>{{$server.DDNSDomain}}</td>
                     <td>
                         <button class="ui icon green mini button" data-clipboard-text="{{$server.Secret}}" data-tooltip="{{tr "ClickToCopy"}}">
                             <i class="copy icon"></i>