Restore removed files

inventory-server/dashboard/aircall-server/src/utils/redis.js

@@ -0,0 +1,23 @@
+import { createClient } from 'redis';
+
+const REDIS_URL = process.env.REDIS_URL || 'redis://localhost:6379';
+
+export async function createRedisClient() {
+  try {
+    const client = createClient({
+      url: REDIS_URL
+    });
+
+    await client.connect();
+    console.log('Connected to Redis');
+    
+    client.on('error', (err) => {
+      console.error('Redis error:', err);
+    });
+
+    return client;
+  } catch (error) {
+    console.error('Redis connection error:', error);
+    throw error;
+  }
+}