Try and replace custom dev-server with webpack-dev-server

[LinusBorg]

Originally, back in the day, we came up with our own dev-server implementation because webpack-dev-server because at that time, it was lacking some features, like the error-overlay.

Since then, it hs improved significantly, and I'm not aware of any particular noteworthy advantage of your custom devserver over webpack's.

So I'll look into this a bit more, and if there really is no advantage left, I will work out a PR to switch the template to webpack-dev-server.

This will remove the maintainance burden for the dev server from this template and also makes it more approachable for people already familiar with webpack-dev-server.

TODO

• Check feature parity (sucess!)
• change webpack config and package.json scripts to use webpack-dev-server
• Test this setup.
• remove dead code.
• review and close PRs / notify contributors of those PRs that may still target the now removed dev-server code.
• Review & test

[haidongsong]

# I'm a rookie, and I follow a video to learn to do app, and I edit and modify the dev-server.js in the video. I don't have this document. What do I do?

[LinusBorg]

I don't know what you are told to change, so I can't say what that means with the new dev server.