refactor: add /api/livez endpoint for kubernetes liveness probe, remove readiness probe

src/pages/api/livez.ts

@@ -0,0 +1,14 @@
+import type {NextApiRequest, NextApiResponse} from 'next'
+
+// GET /api/livez
+export default async function handle(
+  req: NextApiRequest,
+  res: NextApiResponse,
+) {
+  if (req.method !== 'GET') {
+    res.status(405).end();
+    return;
+  }
+
+  res.status(200).json({status: 'ok'});
+}