Replace `webhooks.middleware` with `createNodeMiddleware()`

[gr2m]

What’s missing?

For better consistency with other modules (compare https://github.com/octokit/app.js/, https://github.com/octokit/oauth-app.js/), better compatibility with browsers, and better composability, we should

1. Export a createNodeMiddleware(app, { path }) function
2. Deprecate webhooks.middleware and the path constuctor option
3. Default the webhooks path to /api/github/webhooks, for better compatibility with the defaults of https://github.com/octokit/oauth-app.js#createnodemiddlewareapp-options

Why?

http request routing is not a concern of the @octokit/webhooks library. When it was created, long-living node processes were the norm. Today, serverless enviroments gain more and more traction, and they come with their own http routing. Moving it out of the core library will make it easier to use in serverless environments, and easier to compose with other libraries, such as https://github.com/octokit/app.js/, https://github.com/octokit/octokit.js, and github.com/probot/probot/

Alternatives you tried

It's possible to use & compose the library as is today, but it's unnecessary complicated.

[github-actions]

🎉 This issue has been resolved in version 8.9.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot 📦🚀