Function findAvailablePort

server/index.js:61–73

(startPort)

const IDLE_TIMEOUT_MS = 30 * 60 * 1000;

function findAvailablePort(startPort) {
    const net = require('net');
    return new Promise((resolve) => {
        const server = net.createServer();
        server.listen(startPort, () => {
            server.once('close', () => resolve(startPort));
            server.close();
        });
        server.on('error', () => {
            findAvailablePort(startPort + 1).then(resolve);
        });
    });
}

let idleTimer = null;