There’s no mention of this in the instructions. What would be the reasoning behind adding this? As result of doing this the Express app is now being serving the URLS.
adding
functions = "netlify/functions/"under the[build]section in the netlify.toml file seems to fix it.
https://answers.netlify.com/t/deploy-express-js-to-netlify/91801/13
Yet the source files are still being displayed as you mentioned like package.json as example. I’m not clear on what do to this fix this particular issue now.