Set up webpack to run locally on a custom domain over HTTPS

To make this work with Hot Module Reloading, set the public value to undefined, and then it will use the value in host.

environment.config.devServer.public = undefined
environment.config.devServer.host = 'localhost.example.com'
environment.config.devServer.https = {
  https: true,
  hot: true,
  key: fs.readFileSync(path.resolve('ssl/localhost.example.com.key.pem')),
  cert: fs.readFileSync(path.resolve('ssl/localhost.example.com.cert.pem')),
}

This is because of this line, Which ignores the specified host, if public is defined: https://github.com/webpack/webpack-dev-server/blob/master/lib/utils/createDomain.js#L16

Solved it! Turns out it's very very easy to do with Webpack as I expected, but the documentation is a little confusing.

You simply edit your host file to contain the domain you want, and then add the following code to your webpack.config:

 devServer: {
  host: "localhost.specialurl.com",
  port: 1234,
  https: true
},

Run npm start and point your browser to https://localhost.specialurl.com:1234/webpack-dev-server and you should be all set :)