Add /.well-known/openid-configuration route.

web/src/auth/OidcDiscoveryPage.js

@@ -0,0 +1,30 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import React from 'react';
+import * as Setting from "../Setting";
+
+class OdicDiscoveryPage extends React.Component {
+  componentWillMount() {
+    if (Setting.isLocalhost()) {
+      Setting.goToLink(`${Setting.ServerUrl}/.well-known/openid-configuration`);
+    }
+  }
+
+  render() {
+    return null;
+  }
+}
+
+export default OdicDiscoveryPage;