How to fix npm ERR! code ELIFECYCLE npm ERR! errno SIGINT npm ERR! process terminated with signal SIGINT in npm

# Running dev server
npm run dev
# ... server running ...

# Press Ctrl+C
^C
npm ERR! code ELIFECYCLE
npm ERR! errno SIGINT

process.on('SIGINT', async () => {
  console.log('\nReceived SIGINT. Cleaning up...');

  // Close connections, save state, etc.
  await cleanup();

  // Exit cleanly
  process.exit(0);
});

# Instead of
npm run dev

# Run directly
node --watch src/index.js
# or
npx tsx watch src/index.ts

{
  "scripts": {
    "dev": "node server.js || true"
  }
}

// Force exit on second SIGINT
let isShuttingDown = false;

process.on('SIGINT', () => {
  if (isShuttingDown) {
    console.log('Force exit');
    process.exit(1);
  }

  isShuttingDown = true;
  console.log('Shutting down gracefully... (Ctrl+C again to force)');

  // Graceful shutdown
  server.close(() => process.exit(0));
});

jobs:
  build:
    runs-on: ubuntu-latest
    timeout-minutes: 10  # Set reasonable timeout
    steps:
      - run: npm test
        continue-on-error: true  # Don't fail on interrupt