feat: implement unique visitor tracking using Redis and display count on home page

lib/redis.ts

@@ -0,0 +1,15 @@
+// @ts-ignore
+import { RedisClient } from "bun";
+
+const globalForRedis = global as unknown as { redis: RedisClient };
+
+export const getRedisClient = async () => {
+  if (!globalForRedis.redis) {
+    globalForRedis.redis = new RedisClient(process.env.REDIS_URL || "");
+  }
+  const client = globalForRedis.redis;
+  if (!client.connected) {
+    await client.connect();
+  }
+  return client;
+};