feat: add Redis plugin

Made-with: Cursor

src/plugins/redis.ts

@@ -0,0 +1,32 @@
+import { FastifyInstance, FastifyPluginAsync } from 'fastify';
+import { Redis } from 'ioredis';
+import fp from 'fastify-plugin';
+import { env } from '../config/env.js';
+
+declare module 'fastify' {
+  interface FastifyInstance {
+    redis: Redis;
+  }
+}
+
+const redisPlugin: FastifyPluginAsync = async (app: FastifyInstance) => {
+  const redis = new Redis(env.REDIS_URL, {
+    maxRetriesPerRequest: 3,
+    retryStrategy(times: number) {
+      const delay = Math.min(times * 100, 3000);
+      return delay;
+    },
+  });
+
+  redis.on('error', (err: Error) => {
+    app.log.error({ err }, 'Redis connection error');
+  });
+
+  app.decorate('redis', redis);
+
+  app.addHook('onClose', async () => {
+    await redis.quit();
+  });
+};
+
+export default fp(redisPlugin, { name: 'redis' });