process.on('SIGTERM',function () {
console.log('received SIGTERM');
setTimeout(function () {
console.log('Exiting after some time.');
process.exit(0);
}, 1000);
});
setInterval(function (){
console.log('Heartbeat');
}, 100);
// run with: --killSignal
// forever --killSignal=SIGTERM -w start server.js