報錯信息：
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:\項目文件\webpack'
就是說webpack找不到src這個目錄，解決辦法就是，在項目根目錄裏新建一個src文件夾，然後把你要打包的資源文件放到這個資源文件夾下