Remove redis and add healthcheck endpoint

app.js

@@ -31,6 +31,19 @@ app.use(express.json())
 app.set('view engine', 'ejs')
 app.use(express.static('views/public'))
 
+// Health check endpoint
+app.get(['/health', '/healthz', '/api/health'], (req, res) => {
+    const mongoose = require('mongoose')
+    const isDbConnected = mongoose.connection.readyState === 1
+    res.status(isDbConnected ? 200 : 503).json({
+        status: isDbConnected ? 'healthy' : 'unhealthy',
+        uptime: process.uptime(),
+        timestamp: new Date().toISOString(),
+        service: 'belonging-manager-api',
+        database: isDbConnected ? 'connected' : 'disconnected',
+    })
+})
+
 app.use('/api', routerEndpoints)
 
 const { registerEventHandlers } = require('./events/index')