Support access the DevServer instance from a Webpack plugin

[fightwithtiger]

Feature request

What is the expected behavior?
Is it possible to access DevServer instances from the Webpack plug-in somehow? I want to send custom events from server to client.

This is totally possible with Vite.js, but wonder if there is also a way with Webpack.

What is motivation or use case for adding/changing the behavior?

How should this be implemented in your opinion?
A new hook is provided in the plugin to access devServer

Are you willing to work on this yourself?

[webpack-bot]

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[webpack-bot]

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