feat(health): enhance health check to include database and Redis status

backend/src/health.controller.ts

@@ -1,28 +1,44 @@
-import { Controller, Get } from "@nestjs/common";
+import { CACHE_MANAGER } from "@nestjs/cache-manager";
+import { Controller, Get, Inject } from "@nestjs/common";
+import { Cache } from "cache-manager";
 import { sql } from "drizzle-orm";
 import { DatabaseService } from "./database/database.service";
 
 @Controller("health")
 export class HealthController {
-	constructor(private readonly databaseService: DatabaseService) {}
+	constructor(
+		private readonly databaseService: DatabaseService,
+		@Inject(CACHE_MANAGER) private cacheManager: Cache,
+	) {}
 
 	@Get()
 	async check() {
+		const health: any = {
+			status: "ok",
+			timestamp: new Date().toISOString(),
+		};
+
 		try {
 			// Check database connection
 			await this.databaseService.db.execute(sql`SELECT 1`);
-			return {
+			health.database = "connected";
-				status: "ok",
-				database: "connected",
-				timestamp: new Date().toISOString(),
-			};
 		} catch (error) {
-			return {
+			health.status = "error";
-				status: "error",
+			health.database = "disconnected";
-				database: "disconnected",
+			health.databaseError = error.message;
-				message: error.message,
-				timestamp: new Date().toISOString(),
-			};
 		}
+
+		try {
+			// Check Redis connection via cache-manager
+			// We try to set a temporary key to verify the connection
+			await this.cacheManager.set("health-check", "ok", 1000);
+			health.redis = "connected";
+		} catch (error) {
+			health.status = "error";
+			health.redis = "disconnected";
+			health.redisError = error.message;
+		}
+
+		return health;
 	}
 }