Be sure and check with your hosting service. They may not allow this feature. Mine did not.

"Thank you for contacting TMDHosting Support Team.
 
We have reviewed your request, however, unfortunately, installing a Jot Server, as you have requested is not something that can be achieved on your current Shared Hosting Package.
 
Due to the fact that it requires NodeJS to be active and that it needs a specific port to be bound to the service, you will need a powerful stand-alone VPS package to run the service without any issues.
Therefore, if you wish to use that service, you should consider upgrading to at least our Smart VPS Hosting Solutions..."