add jitsi to well-known config

src/views/domains.html

@@ -228,6 +228,11 @@
             <input type="text" class="form-control" ng-model="domainWellKnown.mastodonHostname" name="mastodonHostname" ng-disabled="domainWellKnown.busy">
           </div>
 
+          <div class="form-group">
+            <label class="control-label">{{ 'domains.domainDialog.jitsiHostname' | tr }} <sup><a ng-href="https://docs.cloudron.io/domains/#jitsi-location" class="help" target="_blank"><i class="fa fa-question-circle"></i></a></sup></label>
+            <input type="text" class="form-control" ng-model="domainWellKnown.jitsiHostname" name="jitsiHostname" ng-disabled="domainWellKnown.busy">
+          </div>
+
           <input class="ng-hide" type="submit" ng-disabled="domainWellKnownForm.$invalid || domainWellKnown.busy"/>
         </form>
       </div>