Phillip/prod perf2 (#15596)

* Add new api call for kubernetes startup probe

* add hostname as tag for loggly

* Only listen to one change

* increase vite min chunk size

* respond gracefully to shutdown signal

* update server readiness according to mongodb and redis connection

* make larger vite chunks

* fix lint

website/server/controllers/api-v4/status.js

@@ -0,0 +1,39 @@
+import {
+  disableCache,
+} from '../../middlewares/cache';
+import SERVER_STATUS from '../../libs/serverStatus';
+
+const api = {};
+
+/**
+ * @api {get} /api/v3/ready Get Habitica's Server readiness status
+ * @apiName GetReady
+ * @apiGroup Status
+ *
+ * @apiSuccess {String} data.status 'ready' if everything is ok
+ *
+ * @apiSuccessExample {JSON} Server is Ready
+ * {
+ *   'status': 'ready',
+ * }
+ */
+api.getReady = {
+  method: 'GET',
+  url: '/ready',
+  // explicitly disable caching so that the server is always checked
+  middlewares: [disableCache],
+  async handler (req, res) {
+    // This allows kubernetes to determine if the server is ready to receive traffic
+    if (!SERVER_STATUS.MONGODB || !SERVER_STATUS.REDIS || !SERVER_STATUS.EXPRESS) {
+      res.respond(503, {
+        status: 'not ready',
+      });
+    } else {
+      res.respond(200, {
+        status: 'ready',
+      });
+    }
+  },
+};
+
+export default api;