报错信息：
WARNING in configuration
The 'mode' option has not been set, webpack will fallback to 'production' for this value. Set 'mode' option to 'development' or 'production' to enable defaults for each environment.
You can also set it to 'none' to disable any default behavior. Learn more: https://webpack.js.org/configuration/mode/ERROR in Entry module not found: Error: Can't resolve './src' in 'D:\项目文件\webpack'
就是说webpack找不到src这个目录，解决办法就是，在项目根目录里新建一个src文件夹，然后把你要打包的资源文件放到这个资源文件夹下