publicPath for dev in V2

[Uneasy]

Since in V2 publicPath for dev is taken from build, how to set it up for dev ?

devServer: {
    publicPath: '/'
  }

that does not work, no matter what it takes it from build:

[sebag]

this works:

build: {
      vueRouterMode: 'history', // available values: 'hash', 'history'
      publicPath: process.env.NODE_ENV === 'development' ? '/' : '/productionPath',
}

but not in devServer