feat: enhance health check endpoint with database status check

src/index.js

@@ -1,6 +1,7 @@
 import express from 'express';
 import cors from 'cors';
 import dotenv from 'dotenv';
+import mongoose from 'mongoose';
 
 dotenv.config();
 
@@ -11,10 +12,25 @@ app.use(cors());
 app.use(express.json());
 
 app.get('/api/health', (req, res) => {
-  res.json({
-    status: 'ok',
-    message: 'Gameno API is running',
-    timestamp: new Date().toISOString()
+  const dbStates = {
+    0: 'disconnected',
+    1: 'connected',
+    2: 'connecting',
+    3: 'disconnecting',
+    99: 'uninitialized'
+  };
+
+  const dbStateCode = mongoose.connection.readyState;
+  const dbStatus = dbStates[dbStateCode] || 'unknown';
+  const isHealthy = dbStateCode === 1;
+
+  res.status(isHealthy ? 200 : 503).json({
+    status: isHealthy ? 'healthy' : 'unhealthy',
+    timestamp: new Date().toISOString(),
+    uptime: process.uptime(),
+    services: {
+      database: dbStatus
+    }
   });
 });