Scenario before configuration:

远程服务器nginx上配置了多域名端口均为80，比如配置另一个test.com，远程机器ip:10.10.10.1
本地配置host: 10.10.10.1 test.com，浏览器里输入test.com即可打开网站

After configuration, I hope that the website can still be opened by accessing test.com, and that the js file can be automatically refreshed after modifying it

webpack.config.js configuration is as follows:

{
    entry: {
    
        test:`/es/test.es`
    },
    output: {
        path: Path.resolve('../', 'build/js/'),
        
        filename: '[name].js'
    },
    devServer: {
        proxy: {
            "/build/js/test.js": 'http://test.com/build/js/test.js'
        },
        contentBase: '../build/js/',
        watchContentBase: true,
        public:'test.com'
}
}

There is only one sentence configured in package.json
"start": "webpack-dev-server",

But the modified file is not automatically refreshed
After the file is changed, automatic compilation can be performed, but the accessed test.com is not automatically refreshed
Please answer