async process () {
    this.context.resolveCacheLoaderOptions()
    this.watchSourceFiles()
    this.watchUserConfig()
    this.watchFrontmatter()
    this.setupDebugTip()
    await this.resolvePort()
    await this.resolveHost()
    this.prepareWebpackConfig()
    return this
  }
Prepare essential data for launch dev server.