try creating health check

kubernetes/app.yml

@@ -57,4 +57,8 @@ spec:
             memory: 100Mi
         ports:
         - containerPort: 8000
+        readinessProbe:
+          httpGet:
+            path: /health
+            port: 8000
 

server/server.js

@@ -33,6 +33,10 @@ import { get404Sketch } from './views/404Page';
 const app = new Express();
 const MongoStore = connectMongo(session);
 
+app.get('/health', (req, res) => {
+  return res.json({success: true});
+});
+
 // For basic auth, in setting up beta editor
 if (process.env.BASIC_USERNAME && process.env.BASIC_PASSWORD) {
   app.use(basicAuth({