feat: new Web UI build system

- use generator-gulp-angular by @swiip
- remove old static file

webui/src/app/sections/providers/frontend-monitor/frontend-monitor.directive.js

@@ -0,0 +1,26 @@
+(function () {
+  'use strict';
+
+  angular
+    .module('traefik.section.providers.frontend-monitor')
+    .directive('frontendMonitor', frontendMonitor);
+
+    function frontendMonitor() {
+      return {
+        restrict: 'EA',
+        templateUrl: 'app/sections/providers/frontend-monitor/frontend-monitor.html',
+        controller: FrontendMonitorController,
+        controllerAs: 'frontendCtrl',
+        bindToController: true,
+        scope: {
+          frontend: '=',
+          frontendId: '='
+        }
+      };
+    }
+
+    function FrontendMonitorController() {
+      // Nothing
+    }
+
+})();

webui/src/app/sections/providers/frontend-monitor/frontend-monitor.html

@@ -0,0 +1,23 @@
+<div class="panel panel-warning">
+  <div class="panel-heading">
+    <strong><span class="glyphicon glyphicon-globe" aria-hidden="true"></span> {{frontendCtrl.frontendId}}</strong>
+  </div>
+  <div class="panel-body">
+    <table class="panel-table__routes table table-striped table-hover">
+      <tr>
+        <td><em>Route</em></td>
+        <td><em>Rule</em></td>
+        <td><em>Value</em></td>
+      </tr>
+      <tr data-ng-repeat="(routeId, route) in frontendCtrl.frontend.routes">
+        <td>{{routeId}}</td>
+        <td>{{route.rule}}</td>
+        <td><code>{{route.value}}</code></td>
+      </tr>
+    </table>
+  </div>
+  <div data-bg-show="frontendCtrl.frontend.backend" class="panel-footer">
+    <span class="label label-warning" role="button" data-toggle="collapse" href="#{{frontendCtrl.frontend.backend}}" aria-expanded="false">{{frontendCtrl.frontend.backend}}</span>
+    <span data-ng-show="frontendCtrl.frontend.passHostHeader" class="label label-warning">Pass Host Header</span>
+  </div>
+</div>

webui/src/app/sections/providers/frontend-monitor/frontend-monitor.module.js

@@ -0,0 +1,6 @@
+(function () {
+  'use strict';
+
+  angular.module('traefik.section.providers.frontend-monitor', []);
+
+})();