feat: add system info page (#1033)

* feat: add system info page

* feat: add some code

* fix

web/src/backend/SystemInfo.js

@@ -0,0 +1,29 @@
+// Copyright 2022 The Casdoor 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 * as Setting from "../Setting";
+
+export function getSystemInfo(owner, name) {
+  return fetch(`${Setting.ServerUrl}/api/get-system-info?id=${owner}/${encodeURIComponent(name)}`, {
+    method: "GET",
+    credentials: "include",
+  }).then(res => res.json());
+}
+
+export function getGitHubLatestReleaseVersion() {
+  return fetch(`${Setting.ServerUrl}/api/get-release`, {
+    method: "GET",
+    credentials: "include",
+  }).then(res => res.json());
+}