Does not work with yalc

[blackarctic]

I am unable to develop a package locally with yalc with module federation. This is particularly a need for developing stateful packages.

Steps to reproduce:

1. Create a local package called my-package. Run yalc publish inside it.
2. In an app using module federation, run yalc add my-package and add my-package to shared in ModuleFederationPlugin.
3. Run webpack.

Result: An error is thrown:

ERROR in overridable my-package
Module not found: Error: Can't resolve 'my-package' in '/Users/nick/my-app'

[blackarctic]

Solved. package.json must have an entrypoint OR your package must have an index.js file at the root. Then this appears to work fine.