app.js

function asyncStuff() {
    return new Promise((resolve, reject) => {
        console.log('call api')
        req.post(`${webdomain}/api/p_id/end/${p_id}`)
        setTimeout(() => resolve("finished"), 2000);
    });
}
function killedHandler() {
    console.log("killedHandler called");
    asyncStuff().then(console.log('bye')   );
  // process.exit(1);
}
process.on("SIGINT", killedHandler);