feat: first draft

utils/redis.ts

@@ -0,0 +1,18 @@
+import { Redis } from '@upstash/redis';
+
+if (!process.env.KV_REST_API_URL) {
+  throw new Error('KV_REST_API_URL is not defined');
+}
+
+if (!process.env.KV_REST_API_TOKEN) {
+  throw new Error('KV_REST_API_TOKEN is not defined');
+}
+
+export const redis = new Redis({
+  url: process.env.KV_REST_API_URL,
+  token: process.env.KV_REST_API_TOKEN,
+  retry: {
+    retries: 3,
+    backoff: (retryCount) => Math.min(retryCount * 100, 3000),
+  },
+});