How to run node app in a subdirectory URL while main domain running wordpress?

Hello There,
I have a wordpress blog running on mysite.com and I want my node app to run on mysite.com/nodeapp/.
Can you please help me with a process or share the .vconfig code to do that?

Extra Info: Node app is a custom CMS that will generate posts URL like
mysite.com/nodeapp/post-1
mysite.com/nodeapp/post-2
mysite.com/nodeapp/hello-world