Hosting nodejs/mongodb on a the same domain with a website serving asp.net/sql?

Multi tool use

Hosting nodejs/mongodb on a the same domain with a website serving asp.net/sql?
So my client has a website built with ASP.NET and SQL Server on a windows machine on godaddy.
She wanted me to make a wep app for her. I built it with nodejs and mongodb. She will be the only user of web app.
Would it be possible to add a nodejs/mongodb to her currently domain under a hidden path with login? She still wants her old website to run. Or Do I need another hosting. She has other domains but only one hosting.
By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.