I have a github project with two node.js service. I would like to share memlib.js. The service root directory is /server and /enquiry respectively.

I tried to "cp" memlib.js in railway.json and package.json, but both doesn't work.
How can I do it?

repo-root/
├── memlib/
│ └── memlib.js
├── server/
│ └── server.js

└── enquiry/

└── enquiry.js