server.js

const express = require('express');
const app = express();
const port = process.env.PORT || 8080;

// Middleware
app.use(express.json());

// Health check endpoint
app.get('/health', (req, res) => {
  res.status(200).json({
    status: 'healthy',
    timestamp: new Date().toISOString(),
    version: process.env.npm_package_version || '1.0.0',
    environment: process.env.NODE_ENV || 'development'
  });
});

// Root endpoint
app.get('/', (req, res) => {
  res.json({
    message: '🚀 DevSecOps Sample Application',
    description: 'A sample application demonstrating DevSecOps CI/CD pipeline with security scanning',
    endpoints: {
      health: '/health',
      metrics: '/metrics',
      info: '/info'
    },
    security: {
      scanning: 'enabled',
      tools: ['gitleaks', 'trivy', 'semgrep', 'checkov', 'hadolint'],
      gates: 'enforced'
    }
  });
});

// Info endpoint
app.get('/info', (req, res) => {
  res.json({
    application: 'DevSecOps Sample App',
    version: process.env.npm_package_version || '1.0.0',
    build: process.env.BUILD_NUMBER || 'local',
    commit: process.env.GIT_COMMIT || 'unknown',
    environment: process.env.NODE_ENV || 'development',
    uptime: process.uptime(),
    memory: process.memoryUsage(),
    platform: process.platform,
    nodeVersion: process.version
  });
});

// Metrics endpoint (basic)
app.get('/metrics', (req, res) => {
  res.json({
    uptime: process.uptime(),
    memory: process.memoryUsage(),
    cpu: process.cpuUsage(),
    timestamp: new Date().toISOString()
  });
});

// 404 handler
app.use('*', (req, res) => {
  res.status(404).json({
    error: 'Not Found',
    message: 'The requested endpoint does not exist',
    availableEndpoints: ['/', '/health', '/info', '/metrics']
  });
});

// Error handler
app.use((err, req, res, next) => {
  console.error('Error:', err);
  res.status(500).json({
    error: 'Internal Server Error',
    message: 'Something went wrong!'
  });
});

// Start server
app.listen(port, '0.0.0.0', () => {
  console.log(`🚀 DevSecOps Sample App listening on port ${port}`);
  console.log(`📊 Health check: http://localhost:${port}/health`);
  console.log(`📋 Info: http://localhost:${port}/info`);
  console.log(`📈 Metrics: http://localhost:${port}/metrics`);
});

// Graceful shutdown
process.on('SIGTERM', () => {
  console.log('SIGTERM received, shutting down gracefully');
  process.exit(0);
});

process.on('SIGINT', () => {
  console.log('SIGINT received, shutting down gracefully');
  process.exit(0);
});