Node.js npm开始显示未定义的index.html事件，尽管存在index.html

我正在尝试在Flatter中实现一个voip呼叫，从github获得了一个示例代码，服务器是在node js中完成的，这对我来说是新的，我可以安装node js，并且可以从npm start开始，但显示了如下问题

[./node_modules/webpack/hot sync ^\.\/log$] (webpack)/hot sync nonrecursive ^\.\/log$ 170 bytes {main} [built]
[./node_modules/webpack/hot/dev-server.js] (webpack)/hot/dev-server.js 1.59 KiB {main} [built]
[./node_modules/webpack/hot/emitter.js] (webpack)/hot/emitter.js 75 bytes {main} [built]
[./src/index.js] 166 bytes {main} [built]
    + 331 hidden modules
Child html-webpack-plugin for "index.html":
     1 asset
    Entrypoint undefined = ./index.html
    [./node_modules/html-webpack-plugin/lib/loader.js!./src/index.html] 370 bytes {0} [built]
    [./node_modules/lodash/lodash.js] 528 KiB {0} [built]
    [./node_modules/webpack/buildin/global.js] (webpack)/buildin/global.js 472 bytes {0} [built]
    [./node_modules/webpack/buildin/module.js] (webpack)/buildin/module.js 497 bytes {0} [built]
i ｢wdm｣: Compiled successfully.

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页面正在加载，但表示无法访问该站点。

您是否安装了所需的所有软件包？1.npm安装2。npm startyes，我从github获得了server node js项目，首先安装node js，然后是npm安装，然后是npm启动。您安装了所有需要的软件包吗？1.npm安装2。npm startyes，我从github获得了服务器节点js项目，首先安装了节点js，然后安装了npm，然后启动了npm。