PR Details

This makes the exports of the module a factory function rather than exporting app directly. Doing this brings the API in line with express and allows you to create more than one app in a node process.

This is a breaking change, but could be converted to a non-breaking change by continuing to export the app and adding the factory function to it. I decided against that because I thought people would expect it to work like express.

Motivation and Context

I maintain a development server that allows you to start multiple http servers with webpack-dev-middleware using a single command. The use cases are:

• If you're creating two versions of an app (maybe a lite and a pro, or for two different user types) this allows you to run both.
• You can run things like storybook or other testing environments.
• You can run multiple back end process simultaneously.

How Has This Been Tested

Unit tests pass. I am using it locally in my dev server.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document. (does not exist)
• I have added tests to cover my changes.
• All new and existing tests passed.