Deploy web application .exe

I made a web application which is built into an .exe file so I can run it and see it on a browser on localhost:3000.

How can I make the app open to the world by IP of my computer so it can be accessed by anyone (that is, anyone can visit my website by pointing the browser to my IP)?

I tried NGENIX. I read a lot of articles on how to deploy a web application and I can't get it working.

If it is possible what is the simplest way on Ubuntu?