Why is webpack devserver not finding pages?

Question

JavaScript

The files are stored in the following structure:
--dist
----html
----css
----js
but devServer does not find the page, and you need to go to localhost:5000/html/page_name.html.
How to remove /html prefix from URL and why contentBase didn't work ? Thanks in advance.

const common = {
  plugins: [
    new Webpack.HotModuleReplacementPlugin()
  ],
  devServer: {
    contentBase: path.resolve(__dirname, '../dist/html'),
    compress: false,
    port: 5000,
    index: 'frontpage.html',
    open: true,
    overlay: {
      warnings: true,
      errors: true
    },
    historyApiFallback: true,
    inline: true
  }
};