cookie-session.js

const expressSession = require('cookie-session')

   var expiryDate = new Date(Date.now() + 10 * 24 * 60 * 60 * 1000); // 10 days

    const session = expressSession({
      secret: sessionSecret,
      resave: false,
      saveUninitialized: true,
      cookie: {
        secureProxy: true,
        httpOnly: true,
        domain: 'example.com',
        expires: expiryDate
      }
    })

    app.use(session)