This is a base project that spins up a simple Express.js server that can be used within Netlify using serverless-http. This project has two routes:

/  
/alternative

The routing works in netlify using the index.html and alternative.jt,l files found in the route. This could be swapped for a better Javascript solution.

To debug locally use:

npm run start-api

This will allow you to debug on port 3000. You can also debug the express server directly, using nodemon.

npm run start 

https://express-in-netlify.netlify.app/