problem description

`
in the process of server rendering, cross-domain is always unsuccessful, and the address of each request for data will go to
`

the environmental background of the problems and what methods you have tried

looked for du Niang and related information, but could not find

related codes

-package.json
`

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "npm-run-all --parallel dev:**",
    "dev:start": "nodemon --watch build --exec node \"./build/bundle.js\"",
    "dev:build:server": "webpack --config webpack.server.js --watch",
    "dev:build:client": "webpack --config webpack.client.js --watch"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "axios": "^0.18.0",
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.5",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-0": "^6.24.1",
    "express": "^4.16.3",
    "npm-run-all": "^4.1.3",
    "react": "^16.4.1",
    "react-dom": "^16.6.0",
    "react-redux": "^5.1.0",
    "react-router-dom": "^4.3.1",
    "react-thunk": "^1.0.0",
    "redux": "^4.0.1",
    "redux-thunk": "^2.3.0",
    "webpack": "^4.16.0",
    "webpack-cli": "^3.0.8",
    "webpack-merge": "^4.1.4",
    "webpack-node-externals": "^1.7.2",
    "webpack-dev-middleware": "^3.1.0",
    "webpack-dev-server": "^3.1.1",
    "webpack-hot-middleware": "^2.21.2"
  }
}

`
-webpack.base.js
`

const path = require("path");
const webpack = require("webpack");
const merge = require("webpack-merge");

module.exports = {
    module: {
        rules: [{
            test: /\.js?$/,
            loader: "babel-loader",
            exclude: /node_modules/,//node_modules
            options: {
                presets: [
                    "react", "stage-0",
                    ["env", {
                        targets: {
                            browsers: ["last 2 versions"]
                        }
                    }]
                ]
            }
        }]
    },
    devServer: {
        contentBase: path.join(__dirname, "./public"),
        publicPath:"/",
        host: "127.0.0.1",
        port: "3000",
        overlay: true, // 
        // open: true, // 
        // stats: "errors-only", //stats: "errors-only":
        hot: true, // 
        //
        proxy: {
            "/api/*":{
                target: "https://api.douban.com",
                secure: true,
                changeOrigin: true
            }
        }
    },
    plugins: [
        //
        new webpack.HotModuleReplacementPlugin(),
        new webpack.DefinePlugin({
            "process.env.BASE_URL": "\"" + process.env.BASE_URL + "\""
        })
          
    ],
    devtool: "source-map",  // 
}    

`
-- webpack.client.js
`

const path = require("path");
const merge = require("webpack-merge");
const baseConfig = require("./webpack.base.js");

const clientConfig = {
    mode: "development",
    entry: "./src/client/index.js",
    output: {
        filename: "index.js",
        path: path.resolve(__dirname, "public")
    }
}

module.exports = merge(baseConfig, clientConfig)

`
-webpack.server.js
`

const path = require("path");
const nodeExternals = require("webpack-node-externals")
const merge = require("webpack-merge");
const baseConfig = require("./webpack.base.js");

const serverConfig = {
    target: "node",//
    mode: "development",
    entry: "./src/server/index.js",
    output: {
        filename: "bundle.js",
        path: path.resolve(__dirname, "build")
    },
    externals: [nodeExternals()]//
}

module.exports = merge(baseConfig,serverConfig)    

`
-reducer.js
`

import axios from "axios"

export const getHomeList = () => {
    return (dispatch) => {
       
        axios.get("/api/v2/movie/in_theaters").then((res)=>{
            
            console.log( res,"res")
            // dispatch(changeList(data))
        }).catch((err)=>{
            console.log(err,"error")
        })
    }
}

`

I hope the boss can help me solve the problem. Thank you

GitHub: https://github.com/yyccQQu/Re.